C# Interview Questions with Answers

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C# Interview Questions & Answers

  • Question 1 :- Explain difference between .NET and C# ?
  • Question 2 :- .NET Framework vs .NET Core vs .NET 5.0
  • Question 3 :- What is IL ( Intermediate Language) Code ?
  • Question 4 :- What is the use of JIT ( Just in time compiler) ?
  • Question 5 :- Is it possible to view IL code ?
  • Question 6 :- What is the benefit of compiling in to IL code ?
  • Question 7 :- Does .NET support multiple programming languages ?
  • Question 8 :- What is CLR ( Common Language Runtime) ?
  • Question 9 :- What is managed and unmanaged code ?
  • Question 10 :- Explain the importance of Garbage collector ?
  • Question 11 :- Can garbage collector claim unmanaged objects ?
  • Question 12 :- What is the importance of CTS ?
  • Question 13 :- Explain CLS ?
  • Question 14 :- Difference between Stack vs Heap ?
  • Question 15 :- What are Value types & Reference types?
  • Question 16 :- Explain boxing and unboxing ?
  • Question 17 :- What is consequence of boxing and unboxing ?
  • Question 18 :- Explain casting,implicit casting and explicit casting ?
  • Question 19 :- What can happen during explicit casting ?
  • Question 20 :- Differentiate between Array and ArrayList ?
  • Question 21 :- Whose performance is better array or arraylist ?
  • Question 22 :- What are generic collections ?
  • Question 23 :- What are threads (Multithreading)?
  • Question 24 :- How are threads different from TPL ?
  • Question 25 :- How do we handle exceptions in C#(try/catch)?
  • Question 26 :- What is the need of finally?
  • Question 27 :- Why do we need the out keyword ?
  • Question 28 :- What is the need of Delegates ?
  • Question 29 :- What are events ?
  • Question 30 :- Whats the difference between Abstract class and interface ?

C# Interview Questions & Answers - Part 2.

  • Question 31 :- What is a Multicast delegates ?
  • Question 32 :- What is a Event ?
  • Question 33 :- How to create a event ?
  • Question 34 :- Delegate vs Events.

C# Interview Questions & Answers - Part 3.

  • Question 37 :- What is a class and object ?
  • Question 38 :- Abstraction vs Encapsulation?
  • Question 39 :- Explain Inheritance ?
  • Question 40 :- Explain virtual keyword ?
  • Question 41 :- What is overriding ?
  • Question 42 :- Explain overloading ?
  • Question 43 :- Overloading vs Overriding ?

C# Interview Questions & Answers - Part 4.

  • Question 44 :- What is polymorphism ?
  • Question 45 :- Can polymorphism work with out inheritance ?
  • Question 46 :- Explain static vs dynamic polymorphism ?
  • Question 47 :- Explain operator overloading ?

C# Interview Questions & Answers - Part 5.

  • Question 48 :- Why do we need Abstract classes ?
  • Question 49 :- Are Abstract methods virtual ?
  • Question 50 :- Can we create a instance of Abstract classes ?
  • Question 51 :- Is it compulsory to implement Abstract methods ?
  • Question 52 :- Why simple base class replace Abstract class ?
  • Question 53 :- Explain interfaces and why do we need it ?
  • Question 54 :- Can we write logic in interface ?
  • Question 55 :- Can we define methods as private in interface ?
  • Question 56 :- If i want to change interface what's the best practice ?
  • Question 57 :- Explain Multiple inheritance in Interface ?
  • Question 58 :- Explain Interface Segregation principle ?
  • Question 59 :- Can we create instance of interface ?
  • Question 60 :- Can we do Multiple inheritance with Abstract classes ?

C# Interview Questions & Answers - Part 6.

  • Question 61 :- This video is covering question and answer on differentiate between Abstract Class and Interface in C#.

C# Interview Questions & Answers - Part 7.

  • Question 62 :- Why do we need constructors ?
  • Question 63 :- In parent child which constructor fires first ?
  • Question 64 :- How are initializers executed ?
  • Question 65 :- How are static constructors executed in Parent child ?
  • Question 66 :- When does static constructor fires ?

C# Interview Q&A PDF

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