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ASP.NET interview questions - part 1
Latest answer: Login control provides form authentication. If
we implement for authentication through form authentication then we do it
through code. On the other hand, login control allows the easy
implementation...............
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Latest answer: Fragment caching allows to cache specific
portions of the page rather than the whole page. It is done by implementing the
page in different parts............
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Latest answer: When there is a need to keep the business logic
separate from the User Interface or when there is some class which is big
enough to have multiple number of developers............
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Latest answer: FromHTMLinasppage:<ahref="abc.aspx?qstring1=test">Test
Query String</a>
From server side code: <%response.redirect
"webform1.aspx?id=11"%>...............
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Latest answer: If a site happens to not maintain a ViewState,
then if a user has entered some information in a large form with many input
fields and the page is refreshes, then the values filled up in the form are
lost...........
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Latest answer: With the ‘src’ attribute, the source code files
are deployed and are compiled by the JIT as needed.
Though the code is available to everyone with an access to the server (NOT
anyone on the web)................
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answer
Latest answer: A URL (Uniform Resource Locator) is the address
of some resource on the Web. A resource is nothing but a page of a site. There
are other type of resources than Web pages, but that's the easiest
conceptually...........
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answer
Latest answer: Previously, in ASP.NET, the pages and the code
used to be compiled dynamically and then cached so as to make the requests to
access the page extremely efficient............
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answer
Latest answer: Custom controls are user defined controls. They
can be created by grouping existing controls, by deriving the control from
System.Web.UI.WebControls..........
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answer
Latest answer: It's a way in CLR to maintain a boundary between
various applications to ensure that they do not interfere in working of any
other application...........
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answer
Latest answer: SAO Server Activated Object (call mode): lasts
the lifetime of the server. They are activated as SingleCall/Singleton objects.
It makes objects stateless...........
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answer
Latest answer: Remoting has at least three sections:-
1. Server
2. Client: This connects to the hosted remoting object
3. Common Interface between client and the server .i.e. the channel..........
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answer
Latest answer: Singleton architecture is to be used when all
the applications have to use or share same data...........
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answer
Latest answer: The LeaseTime property protects the object so
that the garbage collector does not destroy it as remoting objects are beyond
the scope of the garbage collector. Every object created has a default
leasetime for which it will be activated..........
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Latest answer: The remoting parameters can be specified through
both programming and in config files. All the settings defined in config files
are placed under <system.runtime.remoting>...........
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answer
Latest answer: Marshaling is a process of transforming or
serializing data from one application domain and exporting it to another
application domain...........
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Latest answer: ObjRef is a searializable object returned by
Marshal() that knows about location of the remote object, host name, port
number, and object name........
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Latest answer: Every service listed has a URI pointing to the
service's DISCO or WSDL document, which is needed to access the webservice and
its 'webmethod" methods..........
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Latest answer: Create a new website by selecting "ASP.NET Web
Site" and giving it a suitable name. service.cs file appears inside the
solution with a default webmethod named as "HelloWorld()"........
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answer
Latest answer: Application Object: Application variable/object
stores an Object with a scope of availability of the entire Application unless
explicitly destroyed.............
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answer
Latest answer: The cache object has dependencies e.g.
relationships to the file it stores. Cache items remove the object when these
dependencies change. As a work around we would need to simply execute a
callback method............
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Latest answer: A process where items are removed from cache in
order to free the memory based on their priority. A property called
"CacheItemPriority" is used to figure out the priority of each item inside the
cache...........
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Latest answer: Page output: Is used to fetch information or
data at page level. It is best used when the site is mainly static. Used by
declaring the output page directive............
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Latest answer: The ways to cache different versions on the same
page using ASP.NET cache object is using OutputCache object............
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Latest answer: Fragment cache is to store user controls
individually within a web form in cache instead of the whole webform as such.
The idea is to simply have different cache parameters for different user
controls.............
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answer
Latest answer: Types of sessions: InProc: The default way to
use sessions. InProc is the fastest way to store and access sessions...........
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answer
Latest answer: Advantages: Easy to implement, Hidden
fields are supported by all browsers, Enables faster access of information
because data is stored on client side............
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Latest answer: Advantages: Hidden frames
allow you to cache more than one data field, The ability to cache and
access data items stored in different hidden forms...........
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Latest answer: Advantages: They are
simple to use. Light in size, thus occupy less memory. Stores server
information on client side. Data need not to be sent back to
server........
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Latest answer: Querystring is way to transfer information from
one page to another through the URL........
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Latest answer: Absolute and sliding expiration are two Time
based expiration strategies. Absolute Expiration: Cache in this case expires at
a fixed specified date or time..............
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Latest answer: Cross-page posting is done at the control level.
It is possible to create a page that posts to different pages depending on what
button the user clicks on. It is handled by done by changing the postbackurl
property of the controls..........
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answer
Latest answer: PreviousPage property is set to the page
property of the nest page to access the viewstate value of the page in the next
page. Page poster = this.PreviousPage;..........
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answer
Latest answer: SQL Cache Dependency in ASP.NET: It is the
mechanism where the cache object gets invalidated when the related data or the
related resource is modified.........
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answer
Latest answer: Post Cache Substitution: It works opposite to
fragment caching. The entire page is cached, except what is to be kept dynamic.
When [OutputCache] attribute is used, the page is cached............
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answer
Latest answer: Users of different countries, use different
languages and others settings like currency, and dates. Therefore, applications
are needed to be configurable as per the required settings based on cultures,
regions, countries........
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answer
Latest answer: Code Page was used before Unicode came into
existence. It was a technique to represent characters in different
languages..........
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answer
Latest answer: Resource files are files in XML format. They
contain all the resources needed by an application. These files can be used to
store string, bitmaps, icons, fonts........
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answer
Latest answer: To support the feature of multiple languages, we
need to create different modules that are customized on the basis of
localization. These assemblies created on the basis of different modules are
knows as satellite assemblies...........
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answer
Latest answer: Al.exe: It embeds the resources into a satellite
assembly. It takes the resources in .resources binary format.......
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answer
Latest answer: ResourceManager class: It provides convenient
access to resources that are culture-correct. The access is provided at run
time.........
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answer
Latest answer: WCF is a framework that builds applications that
can inter-communicate based on service oriented architecture consuming secure
and reliable web services.............
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answer
Latest answer: A service-oriented architecture is collection of
services which communicate with one another other......
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Latest answer: WCF Service is composed of three components:
Service class: It implements the service needed, Host environment: is an
environment that hosts the developed service.............
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Latest answer: WCF can create services similar in concept to
ASMX, but has much more capabilities. WCF is much more efficient than ASP.Net
coz it is implemented on pipeline............
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Latest answer: BasicHttpBinding, WSHttpBinding,
WSDualHttpBinding.......
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answer
Latest answer: Duplex contract: It enables clients and servers
to communicate with each other. The calls can be initiated independently of the
other one.............
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Latest answer: Read Uncommitted: - Also known as Dirty
isolation level. It makes sure that corrupt Data cannot be read. This is the
lowest isolation level............
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answer
Latest answer: Volatile Queues: There are scenarios in the
project when you want the message to deliver in proper time. The timely
delivery of message is very more important and to ensure they are not lost is
important too. Volatile queues are used for such purposes.............
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answer
Latest answer: Windows Workflow Foundation (WF):
It is a platform for building, managing and executing workflow-enabled
applications, for designing and implementing a programming model ..........
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answer
Latest answer: There are 3 types of workflows in WWF:
Sequential Workflow: The sequential workflow style executes a set of contained
activities in order, one by one and does not provide an option to go back to
any step...........
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Latest answer: XOML is an acronym for Extensible Object Markup
Language. XOML files are the markup files. They are used to declare the
workflow and are then compiled with the file containing the implementation
logic..............
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Latest answer: Microsoft's Internet Information Services web
server software is used to make an application offline. The IIS is instructed
to route all incoming requests for the web site to another URL
automatically........
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answer
Latest answer: Script injection attacks called Cross-site
scripting (XSS) attacks exploit vulnerabilities in Web page validation by
injecting client-side script code.............
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answer
Latest answer: Authentication is the process of verifying
user’s details and find if the user is a valid user to the system or not. This
process of authentication is needed to provide authority to the user........
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Latest answer: Authorization is a process that takes place
based on the authentication of the user. Once authenticated, based on user’s
credentials, it is determined what rights des a user have...........
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Login controls are part of ASP. Net’s UI controls collection which allows users
to enter their username and password to login to a website/application. They
provide login solution without the need of writing code...........
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answer
Fragment caching does not cache a WebForm, rather it allows for caching of
individual user controls within a Web Form, where each control can have
different cache duration and behavior...........
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.Net2.0 supports the concept of partial classes which is unlike the concept of
one class one file. In .Net technology, one can define a single class over
multiple files using the concept of partial classes............
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Yes you can do it using a hyperlink< BR><ahref="Abc.aspx?name=test">Click
to go to aspx </a>.............
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.NET Compact Framework is a scaled down versions of .NET
framework for supporting Windows CE based mobile and embedded devices like
mobile phones...............
LINQ is a set of extensions to .NET Framework that
encapsulate language integrated query, set and other transformation
operations...................
Also Read
ASP.NET DataList Control
Using the DataList control, Binding
images to a DataList control dynamically, Displaying data using the DataList
control, Selecting, editing and delete data using this control, Handling the
DataList control events..........
ASP.NET Methodologies
ASP.NET attempts to make the web
development methodology like the GUI development methodology by allowing
developers to build pages made up of controls similar to a GUI. Server controls
in ASP.NET function similarly to GUI controls in other environments..........
Problems ASP.NET Solves
Microsoft developed ASP.NET, which
greatly simplifies the web development methodology...........
ASP.NET issues & options
The truth is that ASP.NET has
several issues that need to be addressed..........
Web application exists in compiled form on the server so the execution speed is
faster as compared to the interpreted scripts.........
AJAX-style communications between client and server. This communication is over
web services. Asynchronous communication. All client-to-server communication in
the ASP.NET 2.0 AJAX framework is asynchronous................
ASP.NET AJAX Futures Community Technology Preview (CTP) — The ASP.NET 2.0 AJAX
framework contains a set of functionality that is experimental in nature. This
functionality will eventually become integrated with the RTM/Core code.
AJAX makes it possible to create better and more responsive websites and web
applications...............
Search engines may not be able to index all portions of your AJAX application
site.........
ASP.NET AJAX is the name of Microsoft’s AJAX solution, and it refers to a set of
client and server technologies that focus on improving web development with
Visual Studio...............
With AJAX, much of the logic surrounding user interactions can be moved to the
client. This presents its own set of challenges. Some examples of AJAX use
include streaming large datasets to the browser that are managed entirely in
JavaScript..................
Understanding Anonymous Types
Anonymous types defined with var are not VB variants. The var keyword signals
the compiler to emit a strong type based on the value of the operator on the
right side. Anonymous types can be used to initialize simple types like
integers and strings but detract modestly from clarity and add little
value..............
We will learn about MVC design patterns, and how Microsoft has made our lives
easier by creating the ASP.NET MVC framework for easier adoption of MVC
patterns in our web applications...............
MVC, which stands for Model View Controller, is a design pattern that helps us
achieve the decoupling of data access and business logic from the presentation
code , and also gives us the opportunity to unit test the GUI effectively and
neatly, without worrying about GUI changes at all..........
Here it shows how a page controller pattern works in ASP.NET.
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