Uploaded January 2021 | Updated September 2026, 3 weeks ago

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Following are the questions covered in this C# Q&A Series :-
Part 1-Questions on Stack, Heap, Boxing, Unboxing, Array, ArrayList, Generics, Threading.
00:00 Introduction.
02:34 Question 1 :- Explain difference between .NET and C# ?
06:44 Question 2 :- .NET Framework vs .NET Core vs .NET 5.0
15:08 Question 3 :- What is IL ( Intermediate Language) Code ?
15:08 Question 4 :- What is the use of JIT ( Just in time compiler) ?
17:03 Question 5 :- Is it possible to view IL code ?
18:14 Question 6 :- What is the benefit of compiling in to IL code ?
20:39 Question 7 :- Does .NET support multiple programming languages ?
22:52 Question 8 :- What is CLR ( Common Language Runtime) ?
24:10 Question 9 :- What is managed and unmanaged code ?
26:21 Question 10 :- Explain the importance of Garbage collector ?
28:11 Question 11 :- Can garbage collector claim unmanaged objects ?
28:33 Question 12 :- What is the importance of CTS ?
30:25 Question 13 :- Explain CLS ?
33:23 Question 14 :- Difference between Stack vs Heap ?
35:27 Question 15 :- What are Value types & Reference types?
36:15 Question 16 :- Explain boxing and unboxing ?
37:01 Question 17 :- What is consequence of boxing and unboxing ?
37:32 Question 18 :- Explain casting,implicit casting and explicit casting ?
39:37 Question 19 :- What can happen during explicit casting ?
40:48 Question 20 :- Differentiate between Array and ArrayList ?
43:12 Question 21 :- Whose performance is better array or arraylist ?
44:22 Question 22 :- What are generic collections ?
46:20 Question 23 :- What are threads (Multithreading)?
47:32 Question 24 :- How are threads different from TPL ?
52:47 Question 25 :- How do we handle exceptions in C#(try/catch)?
54:43 Question 26 :- What is the need of finally?
55:49 Question 27 :- Why do we need the out keyword ?
58:12 Question 28 :- What is the need of Delegates ?
58:45 Question 29 :- What are events ?
59:35 Question 30 :- Whats the difference between Abstract class and interface ?

Part 2 - Questions on Delegates, Event & Delegates vs Events.

Part 3 - Questions OOP, Abstraction, Encapsulation, Inheritance, Virtual, Overriding and overloading.

Part 4 - Questions Polymorphism, Static vs Dynamic polymorphism and operator overloading.

Part 5 - Tricky Questions around Abstract classes and Interfaces.

Part 6 - Answering the most asked Question "Abstract classes vs Interface".

Part 7 - Questions around constructors & in parent child which constructor fires first.

Part 8 - Questions around Shadowing, Sealed, Nested classes and partial classes.

Part 9 - Questions Around SOLID principles , Dependency injection (DI) and IOC

Part 10 - Explain & Differentiate Composition, Aggregation and Association in C#.

Part 11 - Crack questions on Stack, Heap, Boxing, Unboxing, Value & reference types

Part 12 - What is Garbage collector, Managed vs UnManaged code, Memory Leaks.

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