C# .NET SQL Web API – Top 100 Interview Questions in Hindi

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Timecodes
00:00-Introduction
02:56-Q1What is OOPs and What are the main concepts of OOPs?
04:47- Q2What are the advantages and limitations of OOPS?
09:07- Q3What are Classes and Objects?
14:16-Q4What is Inheritance? Why Inheritance is important?
17:55-Q5What are the different types of Inheritance?
20:09-Q6How to prevent a class from being Inherited?
22:00-Q7What is Abstraction?
25:49-Q8What is Encapsulation?
29:12-Q9What is Polymorphism and what are its types?
32:11-Q10What is Method Overloading? In how many ways a method can be overloaded?
34:37-Q11What is the difference between Overloading and Overriding?
38:48-Q12What is the difference between Method Overriding and Method Hiding?
41:04-Section 2
41:53-Q13What is the difference between an Abstract class and an Interface (atleast 4)?
47:58-Q14When to use Interface and when Abstract class?
53:00-Q15Why to even create Interfaces?
56:56-Q16Do Interface can have a Constructor?
57:58-Q17Can an Interface have private access specifier?
59:08-Q18Can you create an instance of an Abstract class or an Interface?
01:00:10-Section3
01:00:50-Q19What are Access Specifiers? What is the default access modifier in a class?
01:05:52-Q20What is Boxing and Unboxing?
01:09:13-Q21What is the difference between “String” and “StringBuilder”? When to use what?
01:13-32Q22What are the basic string operations in C#?
01:15:26-Q23What are Nullable types?
01:16:57 -Q24Explain Generics in C#? When and why to use them?
1:23:40-Section 4
1:24:21-Q25How to implement Exception Handling in C#?
1:27:31-Q26Can we execute multiple Catch blocks?
01:29:00-Q27What is a Finally block and give an example when to use it?
1:30:25-Q28Can we have only “Try” block without “Catch” block?
1:31:50-Q29What is the difference between “throw ex” and “throw”?
1:34:58-Section 5
1:35:49-Q30What are the Loop types in C#?
1:37:51-Q31What is the difference between “continue” and “break” statement?
1:39:54-Q32What is the difference between Array and ArrayList (atleast 2)?
1:42:01-Q33What is the difference between Arraylist and Hashtable?
1:43:34-Q34What are Collections in C# and what are their types?
1:45:44-Q35What is IEnumerable in C#?
1:48:54-Q36What is the difference between IEnumerable and IQueryable in C#? Why to use IQueryable in sql queries?
1:52:12-Section 6
1:53:09-Q37What is the difference between “out” and “ref” parameters?
2:00:14-Q38What is the purpose of “params” keyword?
2:01:47-Q39What is a Constructor?
2:05:12-Q40What are Extension Methods in C#? When to use them?
2:10:18-Q41What you mean by Delegate? When to use them?
2:14:00-Q42What are Multicast Delegates?
2:16:19-Q43What are Anonymous Delegates in C#?
2:17:36-Q44What are the differences between Events and Delegates?
2:20:25-Section7
2:21:17-Q45What is “this” keyword in C#? When to use it?
2:23:34-Q46What is the purpose of “using” keyword in C#?
2:25:48-Q47What is the difference between “is” and “as” operators?
2:29:08-Q48What is the difference between “Readonly” and “Constant” variables (atleast 3)?
2:34:23-Q49What is “Static” class? When to use it?
2:36:45-Q50What is the difference between “var” and “dynamic” in C#?