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.
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 has Mixed HTML and coding logic.
·
Limited development and debugging tools
available.
·
Limited OOPS support.
·
Limited session and application state
management.
·
ASP.Net is supported by compiler and has
compiled language support.
·
Separate code and design logic possible.
·
Variety of compilers and tools available
including the Visual studio.Net.
·
Completely Object Oriented.
·
Complete session and application state
management.
·
Full XML Support for easy data exchange.
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?
·
Server-side code executes on the
server.
·
Client-side code executes in the
client’s browser.
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?
·
Structures are value type and Classes are
reference type
·
Structures can not have constructor or
destructors.
·
Classes can have both constructor and
destructors.
·
Structures do not support Inheritance, while
Classes support Inheritance.
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 authentication uses the
security features integrated into the Windows NT and Windows XP operating
systems to authenticate and authorize Web application users.
·
Forms authentication allows you to
create your own list/database of users and validate the identity of those users
when they visit your Web site.
·
Passport authentication uses the
Microsoft centralized authentication provider to identify users. Passport
provides a way to for users to use a single identity across multiple Web
applications. To use Passport authentication in your Web application, you must
install the Passport SDK.
21. What are the different types of
Validation Controls?
There are six
types of validation controls available :
·
RequiredFieldValidator,
·
RangeValidator,
·
RegularExpressionValidator,
·
CompareValidator
·
CustomValidator,
·
ValidationSummary
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?
·
System.Globalization
·
System.Resources
24. How to Manage State in ASP.Net?
There are several ways to manage
a state.
·
ViewState,
·
QueryString,
·
Cookies,
·
Session,
·
Application.
25. What are the different types of
Caching?
There are three
types of Caching :
·
Output Caching: stores the responses
from an asp.net page.
·
Fragment Caching: Only caches/stores
the portion of page (User Control)
·
Data Caching: is Programmatic way to
Cache objects for performance.
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.
·
System
·
System.Collections
·
System.IO
·
System.web
·
System.web.UI
·
System.web.UI.HTMLControls
·
System.web.UI.WebControls.
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?
·
@Page
·
@Control
·
@Import
·
@Implements
·
@Register
·
@Assembly
·
@OutputCache
·
@Reference
36. What data type does the RangeValidator
control support?
·
Integer
·
String.
·
Date.
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?
·
Init() - when the page is instantiated.
·
Load() - when the page is loaded into server
memory.
·
PreRender() - the brief moment before the page
is displayed to the user as HTML.
·
Unload() - when page finishes loading.
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?
·
Server.Transfer,
·
Server.Execute.
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:
·
Control to Validate
·
Error Message
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?
·
Constants: The value can’t be
changed.
·
Read-only: The value will be
initialized only once from the constructor of the class.
·
Static: Value can be initialized
once.
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?
·
A const can not be static, while readonly can be
static.
·
A const need to be declared and initialized at
declaration only, while a readonly can be initialized at declaration or by the
code in the constructor.
·
A const’s value is evaluated at design time,
while a readonly’s value is evaluated at runtime.
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?
·
Single file and multi file assembly.
·
Assemblies can be static or dynamic.
·
Private assemblies and shared 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?
·
ItemTemplate
·
AlternatingItemTemplate.
87. What are the advantages of an assembly?
·
Increased performance.
·
Better code management and encapsulation.
·
It also introduces the n-tier concepts and
business logic.
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?
·
System.Data
·
System.Data.OleDB
·
System.Data.SQLClient
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?
·
Documentation looks the same.
·
Use Debug class for debug builds.
·
use Trace class for both debug and
release builds.
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?
·
System.String is immutable.
·
System.StringBuilder was designed with the
purpose of having a mutable string where a variety of operations can be
performed.
99. What is the differences between
Server-side and Clientside code?
·
Server side code is executed at the
server side on IIS in ASP.NET framework.
·
while client side code is executed on the
browser.
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.
·
Marshal by value
·
Marshal by reference.
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
·
Sealed classes are those classes which can not
be inherited and thus any sealed class member can not be derived in any other
class.
·
A sealed class cannot also be an abstract class.
111. What are the components of web form in
ASP.NET?
·
Server controls
·
HTML controls
·
Data controls
·
System components.
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?
·
Asp.net is a web technology used for designing
webforms and Vb.net is a programming language
·
ASP.NET is a powerful technology for writing
dynamic web pages.
·
ASP.NET is a way of creating dynamic web pages
while making use of the innovations present in .NET.
·
VB.NET is a language.But ASP.NET is the
Environment where we can create websites or webpages.
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?
·
A DataSet can represent an entire relational
database in memory, complete with tables, relations, and views.
·
A DataSet is designed to work without any
continuing connection to the original data source.
·
DataSets have no current record pointer You can
use For Each loops to move through the data.
·
Though the DataSet is universal, other objects
in ADO.NET come in different versions for different data sources.
·
Data in a DataSet is bulk-loaded, rather than
being loaded on demand.
·
You can store many edits in a DataSet, and write
them to the original data source in a single operation.
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”?
·
“Web.config” files apply settings to
each web application.
·
While “Machine.config” file apply settings
to all ASP.NET applications.
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 :
·
Authentication Modes.
·
IP Address and Domain Name Restriction.
·
DNS Lookups DNS Lookups.
·
Though the DataSet is universal, other objects
in ADO.NET come in different versions for different data sources.
·
The Network ID and Subnet Mask.
·
SSL.
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?
·
ASP.NET makes development simpler and easier to
maintain with an event-driven, server-side programming model.
·
ASP.NET offers built-in security features
through windows authentication or other authentication methods.
·
Content and program logic are separated which
reduces the inconveniences of program maintenance.
·
Built-in caching features.
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?
·
Web.config is used connect database from front
end to back end.
·
Web.config is used to maintain the Appsettimgs
instead of static variables.
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
·
Session Object
·
Application Object
·
Server Object
·
Request Object
·
Request Object
·
Response Object
·
Object Context
·
Error Object
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.
Reference:
