Asp.net / webservice Interview questions
Web Service Questions
1. What is the transport protocol you use to call a Web service?
SOAP (Simple Object Access Protocol) is the preferred protocol.
2. True or False: A Web service can only be written in .NET?
3. What does WSDL stand for?
Web Services Description Language.
4. Where on the Internet would you look for Web services?
5. True or False: To test a Web service you must create a Windows application or Web application to consume this service?
False, the web service comes with a test page and it provides HTTP-GET method to test.
State Management Questions
1. What is ViewState?
ViewState allows the state of objects (serializable) to be stored in a hidden field on the page. ViewState is transported to the client and back to the server, and is not stored on the server or any other external source. ViewState is used the retain the state of server-side objects between postabacks.
2. What is the lifespan for items stored in ViewState?
Item stored in ViewState exist for the life of the current page. This includes postbacks (to the same page).
3. What does the “EnableViewState” property do? Why would I want it on or off?
It allows the page to save the users input on a form across postbacks. It saves the server-side values for a given control into ViewState, which is stored as a hidden value on the page before sending the page to the clients browser. When the page is posted back to the server the server control is recreated with the state stored in viewstate.
4. 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. This requires the a “sticky-server” (or no load-balancing) so that the user is always reconnected to the same 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.
is there any limit for query string? if means what…
How to create a package for web application with components that shared with other applications?
Create a setup project which produces a .msi file.
A shared component assembly must be given a strong name using the following steps:
1. Create a key pair using sn.exe -k on the command line
2. Add AssemblyKeyFileAttribute to the assembly file and set it to the full name and path of the key file generated in step 1.
3. Build the assembly
The setup program detects a strong named assembly and installs it into GAC on the client machine.
what is .net frame work?
.Net framework is an environment provided on top of the OS which looks into
1. Memory management
2. Thread management
1. Language independence
2. Platform independence
It is defined by Microsoft as ‘an environment for building, deploying and running web services and other applications. It consists of three main parts — CLR, framework classes and ASP.Net’
.Net facilitates integration of code written for desktop applications with code written for web applications. It also facilitates creation of assemblies from code files written in different .net languages. It provides a common type system (CTS) for bringing data types of all languages on a common platform.
What do you mean by authentication and authorization
Simple answer to this is as follows Authentication is process of finding whether the user is valid.Example username and password u enter in mail page.That process is authentication Authorization is the process of holding rights for particular task.Example: Usually admin have right to install software in companies and others are not granted this right.
What is difference between Authentication and Authorization?
Authentication–>Checking the validity.Ex:A creditcard validation by Verisign.It is called authenticating the CreditCard
Authorization–>Giving some rights -Ex:I authorize mr.Rahul to sign some papers realted with my bank accounts
You are logged on to a client. You do not have a secure connection from your client to the host
where your Oracle database is running. Which authentication mechanism allows you to connect to the database
using the SYSDBA privilege?
A. Control file authentication
B. Password file authentication
C. Data dictionary authentication
D. Operating system authentication
What is the default authentication mode for IIS
Explain Assemblies?,Difference between Panel and GroupBox?,Differences between ASP and ASP.NET
Assemblies are single deployable unit which consist of classes structures and interface.they consist of metadata which desrcibes assembly version ,name ,type etc. They are known as logical DLL’s .
panel are scrollable and in panels captions can not be displayed.
it is vice versa incase of group box
Asp is not compiled that is interperated where as ASP.net is compiled.
Assemblies are the building blocks of .NET Framework applications; they form the fundamental unit of deployment, version control, reuse, activation scoping, and security permissions. An assembly is a collection of types and resources that are built to work together and form a logical unit of functionality. An assembly provides the common language runtime with the information it needs to be aware of type implementations. To the runtime, a type does not exist outside the context of an assembly.
I found that there are numerous posts for Assemblies but none for giving out the difference between Panel and a Group Box. Although a Panel as well as the groupbox are almost the same there are minute differences.
In group box you can enter text while you cant do that in Panel.
In Panel you have got a built in support for scrollbars which is not available in case of group box.
What is the difference between excute query and excute nonquery.?
Execute Query is the method which is used to return the result of the command like select Query. That is Update Query. The Execute Non Query
is used to return the Query os the statement like the update Delete Insert which returns No data
What is the Subquery ?
Sub query is a query whose return values are used in filtering conditions of the main query.
What is the maximum number of cookies that can be allowed to a web site
Whats the use of @ Register directives ?
Associates aliases with namespaces and class names for concise notation in custom server control syntax.
<%@ Register tagprefix=”tagprefix” Namespace=”namespace” Assembly=”assembly” %><%@ Register tagprefix=”tagprefix” Tagname=”tagname” Src=”pathname” %>
An alias to associate with a namespace.
An alias to associate with a class.
The namespace to associate with tagprefix.
The location (relative or absolute) of the declarative User Control file to associate with the tagprefix:tagname pair.
The assembly in which the namespace that you are associating with tagprefix resides.
Note The assembly name does not include a file name extension.
In DataGrid, is it possible to add rows one by one at runtime. That means after entering data in one row next row will be added.
Yes, for this you have to use datatable and after inserting the first row in datatable u have to bind that datatable to the grid and next time , first u have to add the row in datatable and next bind it to datagrid. keep on doing.
u have to maintain the datatable state
Thanks & Regards,
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