C# Interview Cheat Sheet

1. What are value types and reference types?

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2. What is boxing and unboxing?

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3. What is garbage collection?

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4. What is an interface?

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5. What is abstraction?

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6. What is encapsulation?

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7. What are access modifiers in C#?

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8. What is polymorphism?

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9. What is method overriding?

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10. What is a constructor?

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11. What is a static constructor?

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12. What is an exception?

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13. What is the difference between == and Equals()?

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14. What is C#?

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15. What is the .NET Framework / .NET Runtime?

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16. What is a namespace?

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17. What is a nullable type in C#?

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18. What is the difference between Array and List?

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19. What is the purpose of the var keyword?

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20. What is an enum?

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21. What are properties in C#?

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22. What is an indexer?

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23. What is a delegate?

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24. What is an event in C#?

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25. What is the difference between break and continue?

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26. What is the difference between ref and out keywords?

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27. What is a sealed class?

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28. What is a partial class?

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29. What is the purpose of the using statement?

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30. What is a thread in C#?

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31. What is multithreading?

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32. What is the lock keyword used for?

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33. What is Just-In-Time (JIT) compilation?

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34. What is the difference between is and as operators?

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35. What is the base keyword?

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36. What is the purpose of the readonly struct?

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37. What is the difference between a field and a property?

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38. What is an anonymous type in C#?

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39. What is the difference between IEnumerable and IEnumerator?

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40. What is the difference between IEnumerable and IQueryable?

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41. What is the purpose of extension methods?

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42. What is a static class?

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43. What is the base class for all types in C#?

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44. What is a destructor in C#?

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45. What is method hiding in C#?

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46. What is the difference between early binding and late binding?

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47. What is the yield keyword used for?

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48. What is a generic type?

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49. What is covariance and contravariance?

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50. What is dependency injection in C#?

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