C# Interview Questions with Answers
Updated on
Course overview
- Provider
- Udemy
- Course type
- Paid course
- Level
- Beginner
- Duration
- 3 hours
- Lessons
- 9 lessons
- Certificate
- Available on completion
- Course author
- Shivprasad Koirala
-
- Understanding what kind of Fundamental questions are asked in C# and .NET interviews and how clear the same.
- Answering fundamental C# questions around .NET core vs .NET framework vs .NET 5.0 , IL code , JIT,CTS,CLS,CLR, Managed , Unmanaged code and Garbage collector.
- How to confidently answer questions around stack , heap , value types, reference types ,boxing , unboxing , implicit casting and explicit casting.
- Threading and collections are favorites in C# interviews. A complete section dedicated to answer questions like array,arraylist,array vs arraylist and generics.
- No C# interview is complete with out a question on delegates and events. A full section dedicated to delegates and events and how to answer their differences
- Dedicated OOP Interview section covering Classes , Objects , Polymorphism , Inheritance , virtual methods,overloading ,overriding ,abstract class vs interfaces
- How to handle tricky questions around Shadowing, Sealed classes, Nested classes and partial classes.
Description
If you are looking to clear C# and .NET Interviews then you have landed at the right course. You can be a hero in your project/company , you must have handled complex scenarios.
But failing to answer simple .NET , C# Fundamental question can lead to a very negative impact during interviews.
This course focuses on Fundamental questions around C# and .NET... Happy job hunting.
Below is the list of C# interview questions covered in the Series.
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 :- What's the difference between Abstract class and interface ?
Question 31 :- What is a delegate and How to create a delegate ?
Question 32 :- Where have you used delegates ?
Question 33 :- What is a Multicast delegates ?
Question 34 :- What is a Event ?
Question 35 :- How to create a event ?
Question 36 :- Delegate vs Events.
Question 37 :- Why do we need OOP ?
Question 38 :- What are the important pillars of OOPs ?
Question 39 :- What is a class and object ?
Question 40 :- Abstraction vs Encapsulation?
Question 41 :- Explain Inheritance ?
Question 42 :- Explain virtual keyword ?
Question 43 :- What is overriding ?
Question 44 :- Explain overloading ?
Question 45 :- 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 Class & 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 ?
Question 70 :- What is Shadowing?
Question 71 :- Explain method hiding?
Question 72 :- Shadowing vs Overriding ?
Question 73 :- When do we need Shadowing ?
Question 74 :- Explain Sealed Classes ?
Question 75 :- Can we create instance of sealed classes ?
Question 76 :- What are nested classes and when to use them ?
Question 77 :- Can Nested class access outer class variables ?
Question 78 :- Can we have public, protected access modifiers in nested class ?
Question 79 :- Explain Partial classes ?
Question 80 :- In What scenarios do we use partial classes ?
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