Important .NET and ADO.NET Interview questions with answers

Which are two important components in ADO.NET?

DataReader and DataSet are the two fundamental objects in ADO.NET.

Can you differentiate between Array list and Hash table?

Hashtable stores using and value pair while array only stores values.

Can we have multiple web.config files in a project ?

Yes you can.

Explain the difference between throw and throw ex ?

Below is a nice video from youtube which explains the difference between them practically.

Can you explain what does it means by dataset is a disconnected architecture and data reader is connected ?

Disconnected architecture means dataset can hold data even if SQL goes down , connected architecture means datareader will always need SQL server live or else data reader object will throw a error.

Below is a video which demonstrates this concept.

If you are preparing for .NET interviews please see the below video created by which revises fundamental questions for .Net and C#


About c# and .NET Interview questions

This blog is for developers who want to crack .NET and C# interviews. It has all tips and tricks needed to crack .NET interviews , C# interview , SQL Server interview , Java interview , WCF Interview , Silverlight interview , WPF interview , LINQ interview , Entity framework Interview. Do not forget to watch our Learn step by step video series. Learn MVC in 16 hours:- Learn AngularJS Step by Step:- Learn Design Pattern in 8 hours:- Learn C# and .NET in 60 days:- Learn MSBI in 32 hours:- Learn SharePoint Step by Step in 8 hours:-
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