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ASP.NET Interview Questions
Caching
What is Caching?
What are different types of caching techniques available in .Net?
What is Page or Output Caching in .Net?
How can you implement Page or Output Caching?
What is the use of duration attribute of @OutputCache page directive?
What is the use of VaryByParam attribute of @OutputCache page directive?
Is it possible to cache a web form without using @OutputCache directive?
What is fragment caching in .Net?
How can you implement Data caching?
How do you retrieve the value of a cache item stored in the servers memory?
How can you implement File and Cache Item Dependency?
How can you implement Cache dependencies on a database query?
Explain different types of Cache Dependencies in .Net?
ASP.NET Caching FAQS - 1
ASP.NET Caching FAQS - 2
Validation Controls
What are ASP.NET Validation controls?
Where do the ASP.NET validation controls validate data, on the Client or on the Web Server
Where do the ASP.NET validation controls validate data, on the Client or on the Web Server?
Are the validation controls fired on the client side if javascript is disabled on the client browser?
How can you skip the validation of a button?
Give an example of real time scenario where you might use CausesValidation property of an ASP.NET button control?
What is ASP.NET Custom Validator used for?
How do you programatically check, if the client side validation is not bypassed by disabling the javascript on the client browser?
How do you programatically invoke all validation controls on a page?
What is a validation group?
How do you create a Validation Group?
How validationgroup works in button click?
Can a DropDownList have Validation Controls?
How do you programatically force all validation controls in a particular validation group to be fired?
How can you display Validation error message in a message box?
What are different ways to display validation error message?
What is the difference between Cache and Application variable?
What is the difference between Cache variable and Session variable?
ASP.NET Validation Controls FAQS page 1
Page Navigation Techniques
What are the different page navigation techniques available in .Net?
What is the difference between Response.Redirect and Server.Transfer?
What is the use of Server.Execute method?
Is it possible to send a webform's QueryString, ViewState, and event procedure information to another webform?
Exception Handling
What is an Exception?
What are the different approaches to handle exceptions in asp.net web application?
What will happen if an exception occur inside try block?
Will the finally block get executed, if an exception doesn't occurs?
What is the main use of finally block in exception handling?
State Management
Basics
State Management Faqs
What is State management in ASP.NET?
Why we need State management to maintain state?
What are different state management techniques available in .Net?
What are the advantages and disadvantages of using client side state management?
ViewState
ViewState Faqs 1
ViewState Faqs 2
Can the HTML controls retain state across postbacks?
Can the Asp.Net web server controls retain state across postbacks?
What is a Viewstate?
Where will View State data stored?
How do you Enable/Disable a ViewState of Asp.Net server control on a page?
In which page life cycle event we can access the ViewState Data?
How a ViewState data stored in a page?
How can you enable ViewState encryption for an application?
How can you enable ViewState encryption at page level?
Is ViewState of one page available to other page?
Can you programmatically store and retrieve data from ViewState?
Can I store DataSet in ViewState?
Can I store any custom class object in a ViewState?
Query Strings
Interview Question on QueryStrings
What is a Query String?
How can you send data from one page to other page using Query String?
What are the advantages of using Query String?
What are the Disadvantages of using Query String?
Cookies
Interview Question on Cookies
What is a Cookie?
What are different types of Cookies available in Asp.Net?
What are Non Persistent/ Session Cookies?
How can you create in memory cookies?
What is Persistent Cookie?
How can you create Persistent Cookies?
How do you create a Cookie that never expires?
How can you retrieve the Cookie value from server side?
What are the advantages of using Cookies?
What are the Disadvantages of using Cookies?
Impersonation
Interview Questions on Impersonation
What is impersonation?
What scenarios we can use impersonation?
When anonymous access is enabled in IIS, which identity is used to make a request?
If anonymous access is disabled in IIS, which identity is used to make a request?
How can you implement the impersonation in Asp.Net?
ADO.NET Interview Questions
Basics
Interview Questions on ADO.NET
Interview questions on ADO.NET Page 2
What is ADO.NET?
What are the data providers available in .net to connect to database?
List all the steps to access data base using ADO.Net?
What is the difference between OleDb data provider and SqlClient?
What is the use of Connection object?
What is the use of Command object?
What are the methods provided by the command object?
What is the use of DataAdapter?
What is the difference between DataReader and DataAdapter?
Will the connection be closed, if the SqlConnection object goes out of scope?
When do you use ExecuteReader method?
When do you use ExecuteNonQuery method?
When do you use ExecuteScalar method?
DataSet
ADO.Net Interview Question on DataSet
What is DataSet?
In which namespace DataSet is available?
Can we add more than one table to DataSet?
Can you relate and enforce constraints on tables in DataSet?
How can you clear data from all the tables in a DataSet?
Can I read xml document that includes both schema and data into DataSet?
What is the difference between DataSet.Copy() and DataSet.Clone()?
How can you save all edits/changes of data in DataSet to DataBase?
What happens when you invoke Dataset’s AcceptChanges() method?
How do you find a DataSet has any changes made to it, since it was last loaded?
Interview Questions On OOPS
Interface Vs Abstract Class
Interview Question on Abstract Class & Interfaces
What is an Abstract Class?
Can I mark Abstract class with sealed modifier?
Can I mark Abstract class with sealed modifier?
Is it mandatory to have at least one Abstract method in Abstract Class?
Can I declare abstract members as protected or internal in abstract class?
Can I declare abstract members as private in abstract class?
Can I declare variables in Abstract Class?
What is an Interface?
Can a class implement multiple Interfaces?
Consider a scenario, class which is implemented two interfaces with same method name in it
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