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C# Interview Questions

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21.

What is the difference between `Task` and `Task<T>`?

beginner

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22.

What is the difference between stack and heap memory?

beginner

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23.

What are extension methods and how do you create them?

beginner

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24.

Explain raw string literals in C# 11.

beginner

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25.

Explain global using directives and file-scoped namespaces.

beginner

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26.

Explain the differences between .NET Framework, .NET Core, and .NET 5+.

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27.

What is the difference between `ref`, `out`, and `in` parameters?

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28.

Explain anonymous types and their limitations.

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29.

What is the `params` keyword and how is it used?

beginner

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30.

Explain the `using` declaration vs `using` statement.

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31.

Explain tuple types and deconstruction.

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32.

What are switch expressions vs switch statements?

beginner

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33.

Explain the concept of boxing and unboxing in C#.

intermediate

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34.

Explain the difference between `==` operator and `Equals()` method.

intermediate

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35.

What is the difference between `abstract` class and `interface`?

intermediate

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36.

What is the difference between `virtual`, `override`, and `new` keywords?

intermediate

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37.

What is the difference between composition and inheritance?

intermediate

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38.

Explain the concept of sealed classes and methods.

intermediate

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39.

What is string interning in C#?

intermediate

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40.

What are generics and what are their benefits?

intermediate

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Showing 21 to 40 of 99 results

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