1.
9. What is HTTPHandler?
HttpHanlder is the low level Request and
Response API to service incoming Http requests. All handlers implement the
IHttpHandler interface. There is no need to use any extra namespace to use it
as it contains in the System.Web namespace. Handlers are somewhat analogous to
Internet Server Application Programming Interface (ISAPI) extensions.
Each incoming HTTP request received by ASP.NET is ultimately processed by a specific instance of a class that implements IHTTPHanlder. IHttpHanlderFactory provides the infrastructure that handles the actual resolution of URL requests to IHttpHanlder instances. In addition to the default IHttpHandlerFactory classes provided by ASP.NET, developers can optionally create and register factories to support rich request resolution
Each incoming HTTP request received by ASP.NET is ultimately processed by a specific instance of a class that implements IHTTPHanlder. IHttpHanlderFactory provides the infrastructure that handles the actual resolution of URL requests to IHttpHanlder instances. In addition to the default IHttpHandlerFactory classes provided by ASP.NET, developers can optionally create and register factories to support rich request resolution
httpHandler – Extenstion Based
Preprocessor :
ASP.NET HTTP handler is the process
that runs in response to a request made to an ASP.NET Web application. The most
common handler is an ASP.NET page handler that processes .aspx files. When
users request an .aspx file, the request is processed by the page through the
page handler. You can create your own HTTP handlers that render custom output
to the browser.
httpModule – Event based
Preprocessor :
An HTTP module is an assembly that
is called on every request that is made to your application. HTTP modules are called
as part of the ASP.NET request pipeline and have access to life-cycle events
throughout the request. HTTP modules let you examine incoming and outgoing
requests and take action based on the request.
When to use HTTP handlers:
- RSS feeds: To create an RSS feed for a Web site, you can create a handler that emits RSS-formatted XML. You can then bind a file name extension such as .rss to the custom handler. When users send a request to your site that ends in .rss, ASP.NET calls your handler to process the request.
- Image server: If you want a Web application to serve images in a variety of sizes, you can write a custom handler to resize images and then send them to the user as the handler’s response.
When to use HTTP modules:
- Security: Because you can examine incoming requests, an HTTP module can perform custom authentication or other security checks before the requested page, XML Web service, or handler is called. In Internet Information Services (IIS) 7.0 running in Integrated mode, you can extend forms authentication to all content types in an application.
- Statistics and logging: Because HTTP modules are called on every request, you can gather request statistics and log information in a centralized module, instead of in individual pages.
- Custom headers or footers: Because you can modify the outgoing response, you can insert content such as custom header information into every page or XML Web service response.
Main Features:
- The IHttpHandler and IHttpModule interfaces are the
starting point for developing handlers and modules.
The IHttpAsyncHandler interface is the starting point for developing asynchronous handlers. - Custom handler and module source code can be put in the App_Code folder of an application, or it can be compiled and put in the Bin folder of an application.
- Handlers and modules developed for use in IIS 6.0 can be used in IIS 7.0 with little or no change.
- Modules can subscribe to a variety of request-pipeline notifications. Modules can receive notification of events of the HttpApplication object.
Built-in HTTP Handlers in ASP.NET
- ASP.NET page handler (*.aspx): The default HTTP handler for all ASP.NET pages.
- Web service handler (*.asmx): The default HTTP handler for Web service pages created as .asmx files in ASP.NET.
- Generic Web handler (*.ashx): The default HTTP handler for all Web handlers that do not have a UI and that include the @ WebHandler directive.
- Trace handler (trace.axd): A handler that displays current page trace information.
10. What is the purpose of HTTP, SOAP in webservice.
11. How many master pages does a page contain?
But, a master page can be based on another master page (so you have chained inheritance).
12. Is it possible to have nested master pages?
13. What is difference between XAML and XML
14. How will you pass a table returned by a SP as parameter to another SP.
15. Where is the table name stored in SQL Server?
16. Write a query to get all the table names.
17. Consider a subquery is used in more than one query in a SP. How will you achieve this? That is how will you write a query that reuses a subquery?
18. Table A has 5 rows and table B has 7 rows. How many rows does "Select * from A, B" return?
Before covering
compiled queries we cover static class main feature. As all of us know static
class is a global cache and helps to store some values or objects. Now comes to
part compiled queries Linq provide us compiled linq queries. Plan is cached in
static class of compiled LINQ queries. So LINQ always use the same plan from
static class rather then preparing for new query plan.
It will depend
on browser most of browser ignore the invalid elements. And some of browser
display the invalid elements on the page.
Yes we read the
registryvalues by using csharp language
Yes it is
possible to create a class at runtime.
GetType method
is one of memeber of system.object class and this method is available on every
object in asp.net. Reflection mostly begin with call to GetType method.
No it is not
possible because of datetime varible type is value and we can set it to be null
in csharp. SO we set this value to minmum one and check this where we need to
check.
Whenever we
change web.config asp.net automaically restarts the application to apply
changes that done to web.config
NO we cannot
use datareader in web services but we can use dataset in it
1.
|
What is ASP.NET?
|
ASP.NET is a server side scripting
technology that enables scripts (embedded in web pages) to be executed by an
Internet server.
ASP.NET provides increased performance by running compiled code. |
2.
|
What is the difference between
Classic ASP and ASP.Net?
|
ASP is
Interpreted language based on scripting languages like Jscript or VBScript.
ASP.Net
is supported by compiler and has compiled language support.
|
3.
|
What is Difference between
Namespace and Assembly?
|
Namespace is a logical design-time
naming convenience, whereas an assembly establishes the name scope for types
at run time.
|
4.
|
What is the difference between
early binding and late binding?
|
Calling a non-virtual method,
decided at a compile time is known as early binding. Calling a virtual method
(Pure Polymorphism), decided at a runtime is known as late binding.
|
5.
|
What is the difference between ASP
Session State and ASP.Net Session State?
|
ASP session state relies on
cookies, Serialize all requests from a client, does not survive process
shutdown, Can not maintained across machines in a Web farm.
|
6.
|
What is the difference between ASP
Session and ASP.NET Session?
|
Asp.net session supports cookie
less session & it can span across multiple servers.
|
7.
|
What is reflection?
|
All .NET compilers produce
metadata about the types defined in the modules they produce. This metadata
is packaged along with the module (modules in turn are packaged together in
assemblies), and can be accessed by a mechanism called reflection.
The System.Reflection namespace contains classes that can be used to interrogate the types for a module/assembly. |
8.
|
What is the difference between
Server.Transfer and response.Redirect?
|
|
The Server.Transfer ()
method stops the current page from executing, and runs the content on the
specified page, when the execution is complete the control is passed back to
the calling page.
While the Response.Redirect () method transfers the control on the specified page and the control is never passed back to calling page after execution. |
||
9.
|
What is a PostBack?
|
|
The process in which a Web page
sends data back to the same page on the server.
|
||
10.
|
What namespace does the Web page
belong in the .NET Framework class hierarchy?
|
System.Web.UI.Page
|
11.
|
What’s a bubbled event?
|
When you have a complex control,
like DataGrid, writing an event processing routine for each object (cell,
button, row, etc.) is quite tedious. The controls can bubble up their event handlers,
allowing the main DataGrid event handler to take care of its constituents.
|
12.
|
What is the differences between
Server-side and Client-side code?
|
|
13.
|
What is the difference between
static or dynamic assemblies?
|
Assemblies can be static or
dynamic.
Static assemblies can include .NET Framework types (interfaces and classes), as well as resources for the assembly (bitmaps, JPEG files, resource files, and so on). Static assemblies are stored on disk in portable executable (PE) files. Dynamic assemblies, which are run directly from memory and are not saved to disk before execution. You can save dynamic assemblies to disk after they have executed. |
14.
|
What are the difference between
Structure and Class?
|
|
15.
|
What is the differences between
dataset.clone and dataset.copy?
|
Dataset.clone copies just the structure of dataset (including all the
datatables, schemas, relations and constraints.); however it doesn’t copy the
data.
Dataset.copy, copies both the dataset structure and the data. |
16.
|
What is the difference between Custom
Control and User Control?
|
Custom Controls are compiled code (Dlls), easier to use, difficult to
create, and can be placed in toolbox. Drag and Drop controls. Attributes can
be set visually at design time. Can be used by Multiple Applications (If Shared
Dlls), Even if Private can copy to bin directory of web application add
reference and use. Normally designed to provide common functionality
independent of consuming Application.
User Controls are similar to those of ASP include files, easy to create, can not be placed in the toolbox and dragged - dropped from it. A User Control is shared among the single application files. |
|
17.
|
What is the difference between ASP
Session State and ASP.Net Session State?
|
ASP session state relies on
cookies, Serialize all requests from a client, does not survive process
shutdown, Can not maintained across machines in a Web farm.
|
18.
|
What is ViewState?
|
ViewState is a .Net mechanism to store the posted data among post
backs. ViewState allows the state of objects to be stored in a hidden field
on the page, saved on client side and transported back to server whenever
required.
|
19.
|
What is Authentication and
Authorization?
|
Authentication is the process of identifying users. Authentication is
identifying/validating the user against the credentials (username and
password) and Authorization performs after authentication.
Authorization is the process of granting access to those users based on identity. Authorization allowing access of specific resource to user. |
20.
|
What are the types of
Authentication?
|
There are 3 types of Authentication. Windows, Forms and
Passport Authentication.
|
21.
|
What are the different types of
Validation Controls?
|
There are six types of validation controls available :
|
22.
|
What is the Web User Control?
|
Combines existing Server and/or
HTML controls by using VS.Net to create functional units that encapsulate
some aspects of UI. Resides in Content Files, which must be included in
project in which the controls are used.
|
23.
|
What namespaces are necessary to
create a localized application?
|
|
24.
|
How to Manage State in ASP.Net?
|
|
There are several ways to manage a state.
|
||
25.
|
What are the different types of
Caching?
|
|
There are three types of Caching :
|
||
26.
|
What is Side-by-Side Execution?
|
The CLR allows any versions of the
same-shared DLL (shared assembly) to execute at the same time, on the same
system, and even in the same process. This concept is known as side-by-side
execution.
|
27.
|
How to view an assembly?
|
We can use the tool
"ildasm.exe" known as "Assembly Disassembler" to view the
assembly.
|
28.
|
Which are the namespaces that are
imported automatically by Visual Studio in ASP.Net?
|
There are 7 namespaces which are imported automatically.
|
29.
|
What are the layouts of ASP.NET
Pages?
|
.
GridLayout positions the form object on absolute x and y co-ordinates of the screen. FlowLayout positions the form objects relative to each other. |
30.
|
What is Delegates?
|
Delegates are a type-safe,
object-oriented implementation of function pointers and are used in many
situations where a component needs to call back to the component that is
using it. Delegates are generally used as basis of events, which allow any
delegate to easily be registered for as event.
|
31.
|
What is a Namespace? What is the
use of a namespace?
|
Namespaces are logical grouping of
classes and other types in hierarchical structure.
Namespaces are useful to avoid collision or ambiguity among the classes and type names. Another use of the namespace is to arrange a group of classes for a specific purpose. |
32.
|
What’s the difference between
Codebehind="MyCode.aspx.cs" and Src="MyCode.aspx.cs"?
|
Visual Studio uses the Codebehind
attribute to distinguish the page source or programming logic from the
design. Also the src attribute will make the page compile on every request.
That is the page will not be compiled in advance and stored in the bin as a
dll instead it will be compiled at run time.
|
|
33.
|
What is datagrid?
|
The DataGrid Web server control is
a powerful tool for displaying information from a data source. It is easy to
use; you can display editable data in a professional-looking grid by setting
only a few properties. At the same time, the grid has a sophisticated object
model that provides you with great flexibility in how you display the data.
|
34.
|
How do you hide the columns?
|
One way to have columns appear
dynamically is to create them at design time, and then to hide or show them as
needed. You can do this by setting a column’s “Visible” property.
|
35.
|
What are different types of
directives in .NET?
|
|
36.
|
What data type does the
RangeValidator control support?
|
|
37.
|
What is cookies?
|
Cookies are small pieces of text,
stored on the client’s computer to be used only by the website setting the
cookies. This allows webapplications to save information for the user, and
then re-use it on each page if needed
|
38.
|
How many classes can a single .NET
DLL contain?
|
It can contain many classes.
|
39.
|
What methods are fired during the
page load?
|
|
40.
|
What is the difference between
Value Types and Reference Types?
|
|
Value Types uses Stack to store
the data.
where as Reference type uses the Heap to store the data. |
||
41.
|
What is the difference between
Server-side scripting and Client-side scripting?
|
|
Server side scripting means that all the script will be executed
by the server and interpreted as needed. ASP doesn't have some of the
functionality like sockets, uploading, etc.
Client side scripting means that the script will be executed immediately in the browser such as form field validation, clock, email validation, etc. Client side scripting is usually done in VBScript or JavaScript. |
||
42.
|
How do you create a permanent
cookie?
|
Permanent cookies are available
until a specified expiration date, and are stored on the hard disk.So Set the
'Expires' property any value greater than DataTime.MinValue with respect to
the current datetime. If u want the cookie which never expires set its Expires
property equal to DateTime.maxValue.
|
43.
|
Which method do you use to
redirect the user to another page without performing a round trip to the
client?
|
|
44.
|
Which method do you use to
redirect the user to another page without performing a round trip to the
client?
|
Server.transfer
|
45.
|
What tag do you use to add a
hyperlink column to the DataGrid?
|
< asp:HyperLinkColumn > <
/ asp:HyperLinkColumn >
|
46.
|
What is web.config file?
|
Web.config file is the
configuration file for the Asp.net web application. There is one web.config
file for one asp.net application which configures the particular application.
Web.config file is written in XML with specific tags having specific
meanings.It includes databa which includes connections,Session States,Error
Handling,Security etc.
|
47.
|
What is the difference between
in-proc and out-of-proc?
|
An Inproc is one which runs
in the same process area as that of the client giving tha advantage of speed
but the disadvantage of stability becoz if it crashes it takes the client
application also with it.
Outproc is one which works outside the clients memory thus giving stability to the client, but we have to compromise a bit on speed. |
48.
|
What is a PostBack?
|
|
The process in which a Web page
sends data back to the same page on the server.
|
||
49.
|
How many languages .NET is
supporting now?
|
|
When .NET was introduced it came
with several languages. VB.NET, C#, COBOL and Perl, etc. The site
DotNetLanguages.Net says 44 languages are supported.
|
||
50.
|
What is smart navigation?
|
The cursor position is maintained
when the page gets refreshed due to the server side validation and the page
gets refreshed.
|
51.
|
How do you validate the controls
in an ASP .NET page?
|
Using special validation controls
that are meant for this. We have Range Validator, Email Validator
|
52.
|
How do you turn off cookies for
one page in your site?
|
Use Cookie.Discard property, Gets
or sets the discard flag set by the server. When true, this property
instructs the client application not to save the Cookie on the user's hard
disk when a session ends.
|
53.
|
Which two properties are on every
validation control?
|
We have two common properties for every validation
controls:
|
54.
|
Which control would you use if you
needed to make sure the values in two different controls matched?
|
CompareValidator is used to ensure
that two fields are identical.
|
55.
|
What is the difference between
HTTP-Post and HTTP-Get?
|
The GET method creates a query
string and appends it to the script's URL on the server that handles the
request.
The POST method creates a name/value pairs that are passed in the body of the HTTP request message. |
56.
|
What is strong-typing versus
weak-typing?
|
Strong typing implies that the types of variables involved in
operations are associated to the variable, checked at compile-time, and
require explicit conversion
Weak typing implies that they are associated to the value, checked at run-time, and are implicitly converted as required. |
|
57.
|
What is boxing and unboxing?
|
Implicit conversion of value type
to reference type of a variable is known as BOXING, for example integer to
object type conversion.
Conversion of reference type variable back to value type is called as UnBoxing. |
58.
|
What is garbage collection?
|
Garbage collection is a system
whereby a run-time component takes responsibility for managing the lifetime
of objects and the heap memory that they occupy.
|
59.
|
What is serialization?
|
Serialization is the process of
converting an object into a stream of bytes.
Deserialization is the opposite process of creating an object from a stream of bytes. Serialization / Deserialization is mostly used to transport objects. |
60.
|
What is the differnce between
Managed code and unmanaged code?
|
Managed Code: Code that runs under a "contract of
cooperation" with the common language runtime. Managed code must supply
the metadata necessary for the runtimeto provide services such as memory
management, cross-language integration, code access security, and automatic
lifetime control of objects. All code based on Microsoft intermediate
language (MSIL) executes as managed code.
Un-Managed Code:Code that is created without regard for the conventions and requirements of the common language runtime. Unmanaged code executes in the common language runtime environment with minimal services (for example, no garbage collection, limited debugging, and so on). |
61.
|
What is difference between
constants, readonly and, static?
|
|
62.
|
What is namespace used for loading
assemblies at run time and name the methods?
|
System.Reflection
|
63.
|
How big is the datatype int in
.NET?
|
32 bits
|
64.
|
What is difference between
abstract classes and interfaces?
|
|
Abstract classes can have concrete
methods while interfaces have no methods implemented.
Interfaces do not come in inheriting chain, while abstract classes come in inheritance. |
||
65.
|
In which event are the controls
fully loaded?
|
|
Page_load event guarantees that
all controls are fully loaded. Controls are also accessed.
In Page_Init events but you will see that viewstate is not fully loaded during this event. |
||
66.
|
What is the use of @ Register
directives?
|
@Register directive informs the compiler
of any custom server control added to the page.
|
67.
|
Define RequiredFieldValidator?
|
It checks whether the control have
any value. It's used when you want the control should not be empty.
|
68.
|
What are the different types of
Session state management options available with ASP.NET?
|
ASP.NET provides In-Process and
Out-of-Process state management. In-Process stores the session in memory on
the web server. Out-of-Process Session state management stores data in an
external data source. The external data source may be either a SQL Server or
a State Server service. Out-of-Process state management requires that all
objects stored in session are serializable.
|
69.
|
What are the difference between
const and readonly?
|
|
70.
|
How do you turn off cookies in one
page of your asp.net application?
|
We may not use them at the max,
However to allow the cookies or not, is client side functionality.
|
71.
|
What’s the difference between
Response.Write () and Response.Output.Write()?
|
Response.Outout.Write allows us to
write the formatted out put.
|
72.
|
What is the difference between
inline and code behind?
|
|
Inline code written along with the
html and design blocks in an .aspx page.
Code-behind is code written in a separate file (.cs or .vb) and referenced by the .aspx page. |
||
73.
|
What is the difference between
early binding and late binding?
|
|
Calling a non-virtual method,
decided at a compile time is known as early binding.
Calling a virtual method (Pure Polymorphism), decided at a runtime is known as late binding. |
||
74.
|
What is the difference between ASP
Session and ASP.NET Session?
|
Asp.net session supports cookie
less session & it can span across multiple servers.
|
75.
|
What is Common Language Runtime?
|
CLR also known as Common
Language Run time provides a environment in which program are executed,
it activate object, perform security check on them, lay them out in the
memory, execute them and garbage collect them.
|
76.
|
What is Intermediate Language?
|
MSIL are also known as Microsoft
Intermediate Language is the CPU-independent instruction set into which
.Net framework programs are compiled. It contains instructions for loading,
storing initializing, and calling methods on objects.
|
77.
|
What is CTS?
|
The Common type system is a
rich type system, built into the common language runtime, which supports the
types and operations found in most programming languages.
|
78.
|
What is Common Langauge
Specification?
|
CLS also known as Common Language
Specification defines the rules which all language must support, in order to
be a part of .Net framework. The Common Language Specification is a set of
constructs and constraints that serves as a guide for library writers and
compiler writers.
|
79.
|
Which class deals wit the user’s
locale information?
|
System.Web.UI.Page.Culture
|
80.
|
What is the lifespan for items
stored in ViewState?
|
|
Items stored in a ViewState exist
for the life of the current page, including the post backs on the same page.
|
||
81.
|
Can we disable ViewState, If, yes
how?
|
|
ViewState can be disabled by using
"EnableViewState" property set to false.
|
||
82.
|
Can you give an example of what
might be best suited to place in the Application_Start and Session_Start
subroutines?
|
All the global declarations or the
variables used commonly across the application can be deployed under
Application_Start. All the user specific tasks or declarations can be dealt
in the Session_Start subroutine.
|
83.
|
What is an assembly?
|
Assemblies are the building blocks
of the .NET framework. They are the logical grouping of the functionality in
a physical file.
|
84.
|
What are different types of
Assemblies?
|
|
85.
|
Which method do you invoke on the
DataAdapter control to load your generated dataset with data?
|
DataAdapter’s fill () method is
used to fill load the data in dataset.
|
86.
|
Which template is to be provided
in the Repeater control in order to display a data?
|
|
87.
|
What are the advantages of an
assembly?
|
|
88.
|
What is an ArrayList?
|
|
The ArrayList object is a
collection of items containing a single data type values.
|
||
89.
|
What is a Literal Control?
|
|
The Literal control is used to
display text on a page. The text is programmable. This control does not let
you apply styles to its content.
|
||
90.
|
Which namespaces are used for data
access?
|
|
91.
|
What is Remoting?
|
Remoting is a means by which one
operating system process, or program, can communicate with another process.
The two processes can exist on the same computer or on two computers
connected by a LAN or the Internet.
|
92.
|
What’s the use of “GLOBAL.ASAX”
file?
|
It allows to executing ASP.NET
application level events and setting application-level variables.
|
93.
|
What is a SESSION and APPLICATION
object?
|
Session object store information
between HTTP requests for a particular user.
Session variables are used to store user specific information where as in application variables we can’t store user specific information. while application object are global across users. |
94.
|
What is the difference between a
Thread and a Process?
|
A thread is a path of execution
that run on CPU, a proccess is a collection of threads that share the same
virtual memory.
A process have at least one thread of execution, and a thread always run in a process context. |
95.
|
What's the difference between the
Debug class and Trace class?
|
|
96.
|
What’s the top .NET class that
everything is derived from?
|
|
System.Object
|
||
97.
|
How is method overriding different
from overloading?
|
|
When Overriding, you change
the method behavior for a derived class.
Overloading simply involves having a method with the same name within the class. |
||
98.
|
What is the difference between
System.String and System.StringBuilder classes?
|
|
99.
|
What is the differences between
Server-side and Clientside code?
|
|
100.
|
What’s an interface?
|
It’s an abstract class with public
abstract methods all of which must be implemented in the inherited classes.
|
101.
|
What is a formatter?
|
A formatter is an object that is
responsible for encoding and serializing data into messages on one end, and
deserializing and decoding messages into data on the other end.
|
102.
|
What is Marshalling?
|
Marshaling is a process of making an object in one process
(the server) available to another process (the client). There are two ways to
achieve the marshalling.
|
103.
|
What is a Static class?
|
|
Static class is a class which can
be used or accessed without creating an instance of the class.
|
||
105.
|
What is a DataSet?
|
|
A DataSet is an in memory
representation of data loaded from any data source.
|
||
106.
|
What is a DataTable?
|
A DataTable is a class in .NET
Framework and in simple words a DataTable object represents a table from a
database.
|
107.
|
What is a life span of a static
variable?
|
A static variable’s life span is
till the class is in memory
|
108.
|
What is the difference between an
abstract method & virtual method?
|
An Abstract method does not
provide an implementation and forces overriding to the deriving class (unless
the deriving class also an abstract class),
Virtual method has an implementation and leaves an option to override it in the deriving class. Thus Virtual method has an implementation & provides the derived class with the option of overriding it. Abstract method does not provide an implementation & forces the derived class to override the method. |
109.
|
How many namespaces are in .NET
version 1.1?
|
124
|
110.
|
What is sealed class
|
|
111.
|
What are the components of web
form in ASP.NET?
|
|
112.
|
How do you turn off cookies for
one page in your site?
|
Use the Cookie. Discard Property
which Gets or sets the discard flag set by the server. When true, this
property instructs the client application not to save the Cookie on the users
hard disk when a session ends.
|
|
113.
|
What is AutoPostback?
|
AutoPostBack automatically posts
the page back to the server when state of the control is changed.
|
114.
|
What is Globalization?
|
Globalization is the process of
creating multilingual application by defining culture specific features like
currency, date and time format, calendar and other issues.
|
115.
|
What is the main difference
between Asp.net and Vb.net?
|
|
116.
|
Is string a value type or a
reference type?
|
Srting is a Reference type.It can
create a new instance at every time.
|
117.
|
What base class do all Web Forms
inherit from?
|
System.web.UI.Page class
|
118.
|
What does assert () do?
|
In debug compilation, assert takes
in a Boolean condition as a parameter, and shows the error dialog if the
condition is false. The program proceeds without any interruption if the
condition is true.
|
119.
|
What is cookie less session? How
it works?
|
By default, ASP.NET will store the
session state in the same process that processes the request, just as ASP
does. If cookies are not available, a session can be tracked by adding a
session identifier to the URL.
|
120.
|
What is the difference between
Compiler and Interpreter?
|
Compiler:
A compiler is a program that translates program (called source code) written in some high level language into object code.A compiler translates high-level instructions directly into machine language and this process is called compiling. Interpreter: An interpreter translates high-level instructions into an intermediate form, which it then executes. Interpreter analyzes and executes each line of source code in succession, without looking at the entire program; the advantage of interpreters is that they can execute a program immediately. |
|
121.
|
What is the difference between an
ADO.NET Dataset and an ADO Recordset?
|
|
122.
|
What are the validation controls?
|
A set of server controls included
with ASP.NET that test user input in HTML and Web server controls for
programmer-defined requirements. Validation controls perform input checking
in server code. If the user is working with a browser that supports DHTML,
the validation controls can also perform validation using client script.
|
123.
|
What is the difference between
“Web.config” and “Machine.Config”?
|
|
124.
|
What is event bubbling?
|
Server controls like Data grid,
Data List, and Repeater can have other child controls inside them. Example
Data Grid can have combo box inside data grid. These child control do not
raise there events by themselves, rather they pass the event to the container
parent (which can be a data grid, data list, repeater), which passed to the
page as “ItemCommand” event. As the child control send events to parent it is
termed as event bubbling.
|
125.
|
What is the use of @ Register
directives?
|
@Register directive informs the
compiler of any custom server control added to the page.
|
126.
|
Where is View State information
stored?
|
In HTML Hidden Fields.
|
127.
|
What is role based security?
|
By default, ASP.NET will store the
session state in the same process that processes the request, just as ASP
does. If cookies are not available, a session can be tracked by adding a
session identifier to the URL.
|
128.
|
What is the difference between Asp
and Asp.net?
|
ASP (Active Server Pages) and ASP.NET are both server side
technologies for building web sites and web applications, ASP.NET is Managed
compiled code - asp is interpreted. and ASP.net is fully Object oriented.
ASP.NET has been entirely re-architected to provide a highly productive programming experience based on the .NET Framework, and a robust infrastructure for building reliable and scalable web applications. |
|
129.
|
What are the various security
methods which IIS Provides apart from .NET?
|
The various security methods which IIS provides are :
|
130.
|
What are Master Pages in ASP.NET?
|
ASP.NET master pages allow you to
create a consistent layout for the pages in your application. A single master
page defines the look and feel and standard behavior that you want for all of
the pages in your application. You can then create individual content pages
that contain the content you want to display. When users request the content
pages, they merge with the master page to produce output that combines the
layout of the master page with the content from the content page.
|
131.
|
What are the advantages of
ASP.Net?
|
|
132.
|
What is event bubbling?
|
Server controls like Data grid,
Data List, and Repeater can have other child controls inside them. Example
Data Grid can have combo box inside data grid. These child control do not
raise there events by themselves, rather they pass the event to the container
parent (which can be a data grid, data list, repeater), which passed to the
page as “ItemCommand” event. As the child control send events to parent it is
termed as event bubbling.
|
133.
|
What is WSDL?
|
|
WSDL stands for Web Services
Description Language is an XML-based language for describing Web services and
how to access them.
WSDL is used to describe Web services. |
||
134.
|
What is the use of @ Register
directives?
|
|
@Register directive informs the
compiler of any custom server control added to the page.
|
||
135.
|
What is the difference between
javascript and vbscript?
|
Javascript :
JavaScript is a client-side scripting language. JavaScript is used to create interactive web applications supported by the Netscape browser. JavaScript is simple to use, lightweight, and dynamic. Developers can easily embed code functionality for interactive applications inside a web page. Javascript is case sensitive and it will be run on client side. VBScript: VBScript is a server-side scripting language. VBScript is not case sensitive and it will be run on server side. |
136.
|
What is a web server?
|
A web server delivers requested
web pages to users who enter the URL in a web browser. Every computer on the
Internet that contains a web site must have a web server program.
|
137.
|
What are Cascading style sheets?
|
Cascading style sheets (CSS) collect and organize all of the formatting
information applied to HTML elements on a Web form. Because they keep this
information in a single location, style sheets make it easy to adjust the
appearance of Web applications.
|
138.
|
What is the base class of .net?
|
System.object
|
139.
|
What is the base class of Asp.net?
|
system.Web.UI
|
140.
|
what is use of web.config?
|
|
|
||
141.
|
What is difference between
abstract classes and interfaces?
|
|
Abstract classes can have concrete methods while interfaces have
no methods implemented.
Interfaces do not come in inheriting chain, while abstract classes come in inheritance. |
||
142.
|
What is GAC or Global Assembly
Cache?
|
Global Assembly Cache (GAC) is a common place to share the .NET assemblies
across many applications. GAC caches all strong named assembly references
within it. All System assemblies that come with the .NET framework reside in
the GAC.
|
143.
|
What is a HashTable?
|
The Hashtable object contains
items in key/value pairs. The keys are used as indexes, and very quick
searches can be made for values by searching through their keys.
|
144.
|
What is CAS or Code Access
Security?
|
Code Access Security - CAS is the part of the .NET security model that
determines whether or not a piece of code is allowed to run, and what
resources it can use when it is running.
|
145.
|
What is the Composite Custom
Control?
|
Combination of existing HTML and
Server Controls.
|
146.
|
What is RangeValidator?
|
RangeValidator - checks whether a
value falls within a given range of number, date or string.
|
147.
|
What base class do all Web Forms
inherit from?
|
System.web.UI.Page class
|
148.
|
What is the difference between System.String
and System.Text.StringBuilder classes?
|
System.String is immutable.
System.StringBuilder was designed with the purpose of having a mutable string where a variety of operations can be performed. |
|
149.
|
How to Create a Cookie?
|
Cookie are one of several ways to
store data about web site visitors during the time when web server and
browser are not connected. Common use of cookies is to remember users between
visits. Practically, cookie is a small text file sent by web server and saved
by web browser on client machine.
The“Response.Cookies” command is used to create cookies. |
150.
|
How do you identify a Master Page?
|
The master page is identified by a
special @ Master directive that replaces the @ Page directive that is used
for ordinary .aspx pages.
|
151.
|
Explain what a diffgram is and a
good use for one?
|
The DiffGram is one of the two XML
formats that you can use to render DataSet object contents to XML. For
reading database data to an XML file to be sent to a Web Service.
|
152.
|
What is ValidationSummary?
|
ValidationSummary - It show a
summary of errors raised by each control on the page on a specific spot or in
a message box.
|
153.
|
How do you indentify that the page
is post back?
|
By checking the IsPostBack
property. If IsPostBack is True, the page has been posted back.
|
154.
|
what are the types of ASP Objects?
|
There are various types of Asp objects
|
155.
|
What are remotable objects in .NET
Remoting?
|
Remotable objects are the objects
that can be marshaled across the application domains. You can marshal by
value, where a deep copy of the object is created and then passed to the
receiver. You can also marshal by reference, where just a reference to an
existing object is passed.
|
156.
|
What is the difference between ASP
Session and ASP.NET Session?
|
||
Asp.net session supports cookie
less session & it can span across multiple servers.
|
|||
1.
|
What is C#?
|
||
|
|||
2.
|
What are the types of comment in
C#?
|
There are 3 types of comments in C#.
|
3.
|
What are the namespaces used in
C#.NET?
|
Namespace is a logical grouping of class.
|
4.
|
What are the characteristics of
C#?
|
There are several characteristics of C# are :
|
5.
|
How does C# differ from C++?
|
|
|
||
6.
|
What are the basic concepts of
object oriented programming?
|
|
It is necessary to understand some of the concepts used
extensively in object oriented programming.These include
|
||
7.
|
Can you inherit multiple
interfaces?
|
Yes. Multiple interfaces may be
inherited in C#.
|
8.
|
What is inheritance?
|
Inheritance is deriving the new
class from the already existing one.
|
9.
|
Define scope?
|
Scope refers to the region of code
in which a variable may be accessed.
|
10.
|
What is the difference between
public, static and void?
|
|
|
||
11.
|
What are the modifiers in C#?
|
|
|
||
12.
|
What are the types of access
modifiers in C#?
|
Access modifiers in C# are :
|
13.
|
What is boxing and unboxing?
|
Implicit conversion of value type
to reference type of a variable is known as BOXING, for example integer to
object type conversion.
Conversion of reference type variable back to value type is called as UnBoxing. |
14.
|
What is object?
|
An object is an instance of a
class. An object is created by using operator new. A class that creates an
object in memory will contain the information about the values and behaviours
(or methods) of that specific object.
|
15.
|
Where are the types of arrays in
C#?
|
|
|
||
16.
|
What is the difference between
Object and Instance?
|
|
An instance of a user-defined type
is called an object. We can instantiate many objects from one class.
An object is an instance of a class. |
||
17.
|
Define destuctors?
|
A destructor is called for a class
object when that object passes out of scope or is explicitly deleted.A
destructors as the name implies is used to destroy the objects that have been
created by a constructors.Like a constructor , the destructor is a member
function whose name is the same as the class name but is precided by a tilde.
|
18.
|
What is the use of enumerated data
type?
|
An enumerated data type is another
user defined type which provides a way for attaching names to numbers thereby
increasing comprehensibility of the code. The enum keyword automatically
enumerates a list of words by assigning them values 0,1,2, and so on.
|
19.
|
Define Constructors?
|
A constructor is a member function
with the same name as its class. The constructor is invoked whenever an
object of its associated class is created.It is called constructor because it
constructs the values of data members of the class.
|
20.
|
What is encapsulation?
|
|
The wrapping up of data and
functions into a single unit (called class) is known as encapsulation.
Encapsulation containing and hiding information about an object, such as
internal data structures and code.
|
||
21.
|
Does c# support multiple
inheritance?
|
|
No,its impossible which accepts
multi level inheritance.
|
||
22.
|
What is ENUM?
|
Enum are used to define constants.
|
23.
|
What is a data set?
|
A DataSet is an in memory
representation of data loaded from any data source.
|
24.
|
What is the difference between
private and public keyword?
|
|
25.
|
Define polymorphism?
|
|
Polymorphism means one name,
multiple forms. It allows us to have more than one function with the same
name in a program.It allows us to have overloading of operators so that an
operation can exhibit different behaviours in different instances.
|
||
26.
|
What is Jagged Arrays?
|
|
|
||
27.
|
what is an abstract base class?
|
An abstract class is a class that
is designed to be specifically used as a base class. An abstract class
contains at least one pure virtual function.
|
28.
|
How is method overriding different
from method overloading?
|
When overriding a method, you
change the behavior of the method for the derived class. Overloading a method
simply involves having another method with the same name within the class.
|
29.
|
What is the difference between ref
& out parameters?
|
An argument passed to a ref
parameter must first be initialized. Compare this to an out parameter, whose
argument does not have to be explicitly initialized before being passed to an
out parameter.
|
30.
|
What is the use of using statement
in C#?
|
|
The using statement is used to
obtain a resource, execute a statement, and then dispose of that resource.
|
||
31.
|
What is serialization?
|
|
Serialization is the process of
converting an object into a stream of bytes.
De-serialization is the opposite process of creating an object from a stream of bytes. Serialization / De-serialization is mostly used to transport objects. |
||
32.
|
What are the difference between
Structure and Class?
|
|
33.
|
What is difference between Class
And Interface?
|
Class : is logical representation of object. It is collection
of data and related sub procedures with defination.
Interface : is also a class containg methods which is not having any definations.Class does not support multiple inheritance. But interface can support. |
34.
|
What is Delegates?
|
Delegates are a type-safe,
object-oriented implementation of function pointers and are used in many
situations where a component needs to call back to the component that is
using it.
|
35.
|
What is Authentication and
Authorization?
|
Authentication is the process of identifying users. Authentication is
identifying/validating the user against the credentials (username and
password).
Authorization performs after authentication. Authorization is the process of granting access to those users based on identity. Authorization allowing access of specific resource to user. |
|
36.
|
What is a base class?
|
A class declaration may specify a
base class by following the class name with a colon and the name of the base
class. omitting a base class specification is the same as deriving from type
object.
|
37.
|
Can “this” be used within a static
method?
|
No ‘This’ cannot be used in a
static method. As only static variables/methods can be used in a static
method.
|
38.
|
What is difference between
constants, readonly and, static ?
|
|
39.
|
What are the different types of
statements supported in C#?
|
C# supports several different kinds of statements are
|
40.
|
What is an interface class?
|
It is an abstract class with
public abstract methods all of which must be implemented in the inherited
classes.
|
|
41.
|
what are value types and reference
types?
|
Value types are stored in the
Stack.
Examples : bool, byte, chat, decimal, double, enum , float, int, long, sbyte, short, strut, uint, ulong, ushort. Reference types are stored in the Heap. Examples : class, delegate, interface, object, string. |
42.
|
What is the difference between
string keyword and System.String class?
|
String keyword is an alias for
Syste.String class. Therefore, System.String and string keyword are the same,
and you can use whichever naming convention you prefer. The String class
provides many methods for safely creating, manipulating, and comparing
strings.
|
43.
|
What are the two data types
available in C#?
|
|
44.
|
What are the different types of
Caching?
|
There are three types of Caching :
|
45.
|
What is the difference between
Custom Control and User Control?
|
Custom Controls are compiled code (Dlls), easier to use, difficult to
create, and can be placed in toolbox. Drag and Drop controls. Attributes can
be set visually at design time. Can be used by Multiple Applications (If
Shared Dlls), Even if Private can copy to bin directory of web application
add reference and use. Normally designed to provide common functionality
independent of consuming Application.
User Controls are similar to those of ASP include files, easy to create, can not be placed in the toolbox and dragged - dropped from it. A User Control is shared among the single application files. |
|
46.
|
What is methods?
|
A method is a member that
implements a computation or action that can be performed by an object or
class. Static methods are accessed through the class. Instance methods are
accessed through instances of the class.
|
47.
|
What is fields?
|
A field is a variable that is
associated with a class or with an instance of a class.
|
48.
|
What is events?
|
An event is a member that enables
a class or object to provide notifications. An event is declared like a field
except that the declaration includes an event keyword and the type must be a
delegate type.
|
49.
|
What is literals and their types?
|
Literals are value constants assigned to variables in a
program. C# supports several types of literals are
|
50.
|
What is the difference between value
type and reference type?
|
|
|
51.
|
What are the features of c#?
|
|
52.
|
What are the types of errors?
|
|
53.
|
What is the difference between break
and continue statement?
|
The break statement is used
to terminate the current enclosing loop or conditional statements in which it
appears. We have already used the break statement to come out of switch
statements.
The continue statement is used to alter the sequence of execution. Instead of coming out of the loop like the break statement did, the continue statement stops the current iteration and simply returns control back to the top of the loop. |
54.
|
Define namespace?
|
The namespace are known as
containers which will be used to organize the hierarchical set of .Net
classes.
|
55.
|
What is a code group?
|
|
A code group is a set of
assemblies that share a security context.
|
||
56.
|
What are sealed classes in C#?
|
|
The sealed modifier is used to
prevent derivation from a class. A compile-time error occurs if a sealed
class is specified as the base class of another class.
|
||
57.
|
What is the difference between
static and instance methods?
|
A method declared with a static
modifier is a static method. A static method does not operate on a specific
instance and can only access static members.
A method declared without a static modifier is an instance method. An instance method operates on a specific instance and can access both static and instance members. The instance on which an instance method was invoked can be explicitly accessed as this. It is an error to refer to this in a static method. |
58.
|
What are the different types of
variables in C#?
|
Different types of variables used in C# are :
|
59.
|
What is meant by method
overloading?
|
Method overloading permits
multiple methods in the same class to have the same name as long as they have
unique signatures. When compiling an invocation of an overloaded method, the
compiler uses overload resolution to determine the specific method to invoke
|
60.
|
What is parameters?
|
||
Parameters are used to pass values
or variable references to methods. The parameters of a method get their
actual values from the arguments that are specified when the method is
invoked. There are four kinds of parameters: value parameters, reference
parameters, output parameters, and parameter arrays.
|
|||
1.
|
Is C# is object oriented?
|
||
YEs, C# is an OO langauge in the
tradition of Java and C++.
|
|||
62.
|
What is the difference between
Array and Arraylist?
|
An array is a collection of the
same type. The size of the array is fixed in its declaration. A linked list
is similar to an array but it doesn’t have a limited size.
|
63.
|
What are the special operators in
C#?
|
C# supports the following special operators.
|
64.
|
What is meant by operators in c#?
|
An operator is a member that
defines the meaning of applying a particular expression operator to instances
of a class. Three kinds of operators can be defined: unary operators, binary
operators, and conversion operators. All operators must be declared as public
and static.
|
65.
|
What is a parameterized type?
|
|
A parameterized type is a type
that is parameterized over another value or type.
|
||
66.
|
What are the features of abstract
class?
|
|
|
||
67.
|
What is the use of abstract
keyword?
|
The modifier abstract is a
keyword used with a class, to indicate that this class cannot itself have
direct instances or objects, and it is intended to be only a 'base' class to
other classes.
|
68.
|
What is the use of goto statement?
|
The goto statement is also
included in the C# language. This goto can be used to jump from inside a loop
to outside. But jumping from outside to inside a loop is not allowed.
|
69.
|
What is the difference between
console and window application?
|
|
70.
|
What is the use of return
statement?
|
The return statement is associated with procedures
(methods or functions). On executing the return statement, the system passes
the control from the called procedure to the calling procedure. This return
statement is used for two purposes :
|
|
71.
|
What is the difference between
Array and LinkedList?
|
Array is a simple sequence of
numbers which are not concerned about each others positions. they are
independent of each others positions. adding,removing or modifying any array
element is very easy. Compared to arrays ,linked list is a comlicated sequence
of numbers.
|
72.
|
Does C# have a throws clause?
|
No, unlike Java, C# does not
require the developer to specify the exceptions that a method can throw.
|
73.
|
Does C# support a variable number
of arguments?
|
Yes, uisng the params keyword. The
arguments are specified as a list of arguments of a specific type.
|
74.
|
Can you override private virtual
methods?
|
No, private methods are not
accessible outside the class.
|
75.
|
What is a multi cast delegates?
|
It is a delegate that points to
and eventually fires off several methods.
|
What is Extension methods
//namespace HomeCustomer
//{
// public static class StringCustomer
// {
// public static int GetValues(this int newValue)
// {
// return newValue * 20;
// }
// }
//}
namespace CustomerInspex.Controllers
{
//using HomeCustomer;
public class HomeController : Controller
{
public ActionResult Index()
{
//int xyz = 10;
//int i = xyz.GetValues();
}
}
}
An extension method is a special kind of static method that can be associated with a type, so that it can be called as if it were an instance method of the type. This feature enables you to, in effect, “add” new methods to existing types without a new derived type, recompiling, or otherwise modifying the original type.
Extension methods are defined as static methods within a static class. Their first parameter specifies which type the method operates on, and the parameter is preceded by the this modifier. Extension methods are only in scope when you explicitly import the namespace into your source code with the ”using” directive or if defined directly in the source code.
Two HTTP Request Methods: GET and POST
Two commonly used methods for a request-response between a client and server are: GET and POST.
- GET - Requests data from a specified resource (Note that query strings (name/value pairs) is sent in the URL of a GET request)
- POST - Submits data to be processed to a specified resource (Note that query strings (name/value pairs) is sent in the HTTP message body of a POST request)
Compare GET vs. POST
The following table compares the two HTTP methods: GET and POST.
| GET | POST | |
|---|---|---|
| BACK button/Reload | Harmless | Data will be re-submitted (the browser should alert the user that the data are about to be re-submitted) |
| Bookmarked | Can be bookmarked | Cannot be bookmarked |
| Cached | Can be cached | Not cached |
| Encoding type | application/x-www-form- | application/x-www-form- |
| History | Parameters remain in browser history | Parameters are not saved in browser history |
| Restrictions on data length | Yes, when sending data, the GET method adds the data to the URL; and the length of a URL is limited (maximum URL length is 2048 characters) | No restrictions |
| Restrictions on data type | Only ASCII characters allowed | No restrictions. Binary data is also allowed |
| Security | GET is less secure compared to POST because data sent is part of the URL Never use GET when sending passwords or other sensitive information! | POST is a little safer than GET because the parameters are not stored in browser history or in web server logs |
| Visibility | Data is visible to everyone in the URL | Data is not displayed in the URL |
How to insert Bulk rows (DataTable) in Sql Server using C# .net
DataTable GetValues = new DataTable();
GetValues.Columns.Add(new DataColumn("Value1"));
GetValues.Columns.Add(new DataColumn("Value2"));
GetValues.Columns.Add(new DataColumn("Value3"));
GetValues.Columns.Add(new DataColumn("Value4"));
GetValues.Columns.Add(new DataColumn("Value5"));
GetValues.Columns.Add(new DataColumn("Value6"));
GetValues.Columns.Add(new DataColumn("Value7"));
for (int index = 1; index <= count; index++)
{
DataRow row = GetValues.NewRow();
row["Value1"] = Convert.ToString(Request.Form["Value1" + index + ""]);
row["Value2"] = Convert.ToString(Request.Form["Value2" + index + ""]);
row["Value3"] = Convert.ToString(Request.Form["Value3" + index + ""]);
row["Value4"] = Convert.ToString(Request.Form["Value4" + index + ""]);
row["Value5"] = Convert.ToString(Request.Form["Value5" + index + ""]);
row["Value6"] = Convert.ToString(Value6);
row["Value7"] = Convert.ToString(Value7);
GetValues.Rows.Add(row);
}
if (sqlConnection.State != ConnectionState.Open) sqlConnection.Open();
SqlCommand sqlCommand = new SqlCommand();
sqlCommand.Connection = sqlConnection;
sqlCommand.CommandType = CommandType.StoredProcedure;
sqlCommand.CommandText = "USP_InsertTable_StoreProcedure";
SqlDataAdapter sqlDatAdapter = new SqlDataAdapter(sqlCommand);
sqlCommand.Parameters.Add("SP_Para1", SqlDbType.VarChar, 50, "Value1");
sqlCommand.Parameters.Add("SP_Para2", SqlDbType.VarChar, 50, "Value2");
sqlCommand.Parameters.Add("SP_Para3", SqlDbType.VarChar, 150, "Value3");
sqlCommand.Parameters.Add("SP_Para4", SqlDbType.VarChar, 150, "Value4");
sqlCommand.Parameters.Add("SP_Para5", SqlDbType.VarChar, 20, "Value5");
sqlCommand.Parameters.Add("SP_Para6", SqlDbType.VarChar, 500, "Value6");
sqlCommand.Parameters.Add("SP_Para7", SqlDbType.VarChar, 50, "Value7");
sqlDatAdapter.InsertCommand = sqlCommand;
sqlDatAdapter.Update(GetValues);
if (sqlConnection.State != ConnectionState.Closed) sqlConnection.Close();
How to Post Back from java Script to Code Behind.
1) Create on Java Script function in that function add this line
__doPostBack('ctl00$ContentPlaceHolder1$btnID', '');
After Control will call Page_Load event. In that event use following Line.
ClientScript.GetPostBackEventReference(this, string.Empty);
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