C# Interview Questions and Answers | Important Csharp Interview Questions | C# Questions
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- เผยแพร่เมื่อ 22 ก.ค. 2024
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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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Shiv sir is superb. He always knew what are the question/s can come in listeners mind while listening to a topic and surprisingly you found he clarifies all your doubts then and there. I have been following him since 2013 (my first job). He is great...
C# Interview Questions and Answers.
0:00 Introduction
2:34 Question 1 :- Explain difference between .NET and C# ?
6:44 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 ?
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.
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 ?
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 ?
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 ?
Question 61 :- Difference between Abstract and Interfaces?
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 ?
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Thank You!
Thank you sir!! Great video 😊👍
One more point want to add on c# function in ref to out keyword : We can return multiple values in .net core c# function by including all return types under () bracket
You explaied so well that I don't have to review it again to remember... Excellent👏
Thanks for this great video.
For the past week I've been watching this once a day. I had a c# interview yesterday and this video helped me get a good job. Thanks so much.
Great video! I noticed the image at 52:11 says the opposite of what you want, use Tasks on new projects, not the old thread approach.
This deserves lot of appreciation. Great content.
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Pp
Great explanation. To the point. Thank you so much for making it so simple.
Good explain Questions & Answer
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Good stuff. He makes it such that his delivery and explanations are clear and engaging.
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Superb video sir. You explained everything with examples. This helps to understand easily.
You are like a superb compiler who can compile the knowledge into every type of learners brain.😎
Thanks do see our other interview questions and learning videos from www.questpond.com/
Loved the way how you explain, really kudos to you because to be able to explain a topic easily is because you understand the topic completely, thanks a lot! 👏
Thank you so much sir. Your explanation is the best. I could understand everything you taught so well!
Thank you @questPond Shiv sir, very simplified explanation.
The interview questions are helpful as it explains the concepts so well using examples and to the point.
Thank you for discussing the important points for interviewing at the end, very important to remember
Golden video that saves so much time! Thank you!
Exemplary video! including code snippets and demonstrations is very helpful!
your explanation is excellent and easy 😊 thank you so much for this video
Shiv sir, you are awesome.. Your explanation is too good..
Awesome examination sir ,thank you so much for great video
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Made my day sir🙏😊 to the point one-liners, that's what I was looking for. Many many thanks 👍💖
Great video. Very well explained. Just a minor comment , I think it's "beat around the bush".
the best teacher ever i have seen.
You are an excellent teacher!!! Thank you so much for everything!
Outstanding explanation! Thank you very much.
Thanks. Do visit www.questpond.com
priceless video, thank you very much
Thank u sir, what a great explanation with examples 👍
good for refreshing csharp as a whole...nice
Really simple same time so effective covered
Excellent Sir..Kudos
Sir, I am rejoining as a developer after a gap of 10 years.. your video has boosted my confidence multi fold. Thanks a ton ..
Hi Bro, I have 5 years of industry experience as a functional resource, I want to pursue my future career as a dotnet developer.. can you suggest some insights on from how/where should I start.. would be very helpful. Thanks for your help!
Great Video Sir, this is very helpful in refreshing all C# concepts real quick... Thank you so much, God bless you.
Video link shared on my twitter handle and email sent to questpond :)
Thanks a lot, Your videos verry useful me crack the Interview Thanks again
Perfect video Shiv🙏...Thank you.
Where is the second part?
Awesome vid!
Btw... Parallely isnt a word... I think 'concurrently' is a better choice when talking about threading.
Thank you so much sir !!!
Such a valuable knowledge
Great help for me Man, Thank you so much, God bless you, You are doing really good job by helping so many students and developers
Thank you for this video!!!!!! You explain really well with examples. very helpful
Thanks. Do visit for whole course www.questpond.com/ordernow.php?forvideos=8months
Great video! I learned a lot, thank you!
Do we deploy il code on server. Or the compiled code after jit execution. If Complied code is deployed then explain significance of il code and jit compiler
Wow I enjoyed the way you explained shiv pls upload part2 soon thanks.
Thank You, do visit www.questpond.com
Wow Great Explanation Sir🙏🙏
Thank you so much 😌
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This appears as a question from the technical round.
Thank you so much for this because I got the job offer.
Congratulations on your job offer.
Superb quality of explanation...❤️
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An excellent explanation. Thank you!
Do visit www.questpond.com/netc-fundamentals-net-collections-generics/cid22
I understood very well to u👍
Thank u
Im preparing for fresgers interview for c#,sql,jquery.
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good informative video...
It's perfect. Thank you very much)
Thank you so much sir. I loved the way u pushing the the topics into mind. Pls upload part-2 sir
Thanks. Do visit for the complete course www.questpond.com/c-step-by-step-with-interview-questions---answers-series/cid62
Boxing is a process of converting values types into reference types:
Unboxing is a process of converting a reference type which is created from a value type back into value type
Thank you very much sir for your deep explanation.
If there would be a button more than like button in you tube then I will definitely go for that.
Thanks and do visit www.questpond.com/netc-fundamentals-net-collections-generics/cid22
Thank you for explaining well 👏
best explain..thank you
Impressive tips
Amazing video!
One of best Teacher
Amazing content
One correction: Code that executes under the supervision of CLR is Managed Code and Code that executes under the supervision of Operating system (ex: COM components, file managment etc) is UnManaged Code.
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Thank you for the great video 👌
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Very helpful, thank you!
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Great work sir
Excellent! Thank you!
Thanks and do visit www.questpond.com/netc-fundamentals-net-collections-generics/cid22
Great job 👏
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Great video 👍
Great explanation men, rhankyou very much. I have the knowledge but your review of this subjects are a lot of help to keep fluent for the interviews.
Hi Sir , you mentioned that threads are running parallel, but I think in one single process scope multiple threads are running in concurrent manner (using time slicing of one CPU core). Can you please explain it?
Thanks for this great video boss ❤
Great video
Thank you soooo much for this!
Veri nice, time saving
Looking forward to second part
Next part of the series will be released soon, do visit www.questpond.com
Really great
Great Explanation.
Excellent
I like how the video was posted in January 2021 and the date modified for the machine language is September 2021. Good video tho
Thanks. It awsome content 👌
Awesome sir..
v v nice
Thank you for this video. please upload the second session.
Second part is part of subscription www.questpond.com/interview-questions---answers-tutorial/cid63
thank you for the video
Correction needed in 14 and 15.
Primitive types can be allocated on heap also if the type is class member. Primitive types allocated on stack only when its declared as local variables or method parameters.
Value type:
Value types need not to be only on stack, it can be allocated on heap also if the type is declared as class member.
Correct definition of value type:
A type which holds direct value(data) in its memory location called value type.
If a type holds reference in the memory location then it is reference type.
Value type and reference type definition not on basis of stack and heap but what its stores in their memory location.
Please refer MSDN documentation for detail explanation.
Kudos to you!!🙌
If I understand it correctly, isn't the reference itself on the stack, but the value it's referencing to, is on the heap?