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C# Job Interview Questions

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What is abstract class and what is it good for?

C# Mid-level
What is covariance and contravariance?

.NET ASP.NET MVC ASP.NET WebAPI ASP.NET WebForms C# Senior
Have you ever consumed some 3rd party API? What was it? Have you ever designed your own API? Could you describe it a bit?

.NET Architecture ASP.NET WebAPI C# Web services Mid-level
What is serialization/deserialization? What types of serialization do you know?

.NET C# Mid-level
What is a MultiCastDelegate? What is it good for? Give some real use case

.NET C# Senior
Can you use multiple catch blocks in try/catch? What would be a use case for such thing?

C# Junior
What do you know about delegates?

.NET C# Mid-level
What is MSIL?

.NET ASP.NET MVC ASP.NET WebAPI ASP.NET WebForms C# Senior
What is JIT?

.NET ASP.NET MVC ASP.NET WebAPI ASP.NET WebForms C# Senior
Could you describe how is memory management done in .NET?

.NET ASP.NET MVC ASP.NET WebAPI ASP.NET WebForms C# Senior
Write a code that takes an integer number and outputs its digits to the console.

.NET C# Code challenge Mid-level
What is variable capturing good for and how does it work?

.NET C# Senior
What will be the output of the following code that is using delegates?

.NET C# Code challenge Senior
Could you describe what generic type inference is and what will be the output of this program?

.NET C# Code challenge Senior
What is the difference between IEnumerable and IQueryable?

.NET C# Entity Framework LINQ Performance Senior
What is boxing and unboxing?

.NET C# Performance Junior
Do you use generics? What are they good for? And what are constraints and why to use them?

.NET C# Performance Mid-level
Could you explain what the following LINQ methods OrderBy, Where and Single do and what will be the output of the code?

.NET C# LINQ Junior
Could you explain on the following example what a deferred execution is and what materialization is? What will the output be?

.NET C# LINQ Performance Mid-level
What array initialization syntaxes do you know?

.NET C# Mid-level
How does the .Max(...) work in LINQ? What will be the result of the following code?

.NET C# LINQ Junior
What is a difference between partial class and partial method and what are they good for?

.NET C# Senior
What is a data type of the following variable? var number = 1.0;

.NET C# Senior

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