C# Programming Interview Questions

S.No Question
1. What is C# and its significance?
2. Explain the features of C#.
3. What is the difference between C# and C++?
4. What are the different types of applications you can develop using C#?
5. Explain the concept of .NET framework and its role in C# development.
6. What is the Common Language Runtime (CLR) in C#?
7. What are the advantages of using C# over other programming languages?
8. Explain the difference between value types and reference types in C#.
9. What is the role of the using statement in C#?
10. Explain the concept of garbage collection in C#.
11. How do you declare variables in C#?
12. Explain the different data types available in C#.
13. What is type conversion and how is it done in C#?
14. Explain the concept of implicit and explicit type conversion in C#.
15. What are the arithmetic operators in C#?
16. How do you perform string concatenation in C#?
17. Explain the concept of relational operators in C#.
18. What are the logical operators in C#?
19. How do you handle null values in C#?
20. Explain the concept of ternary operators in C#.
21. What is the purpose of if-else statements in C#?
22. Explain the switch statement in C#.
23. How do you use for loops in C#?
24. Explain the concept of nested for loops in C#.
25. What is the purpose of while loops in C#?
26. Explain the difference between while and do-while loops in C#.
27. What is the use of the break statement in C#?
28. How do you skip iterations in a loop using the continue statement in C#?
29. Explain the concept of goto statement in C#.
30. How do you exit a loop or a method using the return statement in C#?
31. How do you declare and initialize arrays in C#?
32. Explain the concept of accessing array elements in C#.
33. How do you find the length of an array in C#?
34. What is the difference between arrays and lists in C#?
35. How do you declare and access elements in a 2D array in C#?
36. Explain the concept of multidimensional arrays in C#.
37. What is the purpose of jagged arrays in C#?
38. How do you sort elements in an array in C#?
39. Explain the concept of array covariance in C#.
40. What is a method in C#?
41. How do you define methods in C#?
42. Explain the concept of passing arguments to a method in C#.
43. What is method overloading and how is it done in C#?
44. Explain the difference between parameters and arguments in C#.
45. How do you return values from a method in C#?
46. What is the difference between void and non-void methods in C#?
47. Explain the concept of recursion in C# methods.
48. What is the purpose of ref and out keywords in C#?
49. How do you handle optional parameters in C# methods?
50. What is object-oriented programming (OOP) and its principles?
51. Explain the concept of objects and classes in C#.
52. What are constructors in C# and how are they used?
53. What is the 'this' keyword used for in C#?
54. Explain the concept of static members in C#.
55. How do you create an array of objects in C#?
56. Explain the concept of inheritance in C#.
57. What is method overriding and how is it done in C#?
58. Explain the use of the 'base' keyword in C#.
59. What is the difference between abstract classes and interfaces in C#?
60. What is an interface in C#?
61. How do you implement multiple interfaces in C#?
62. Explain the concept of multiple inheritance in C#.
63. What are namespaces in C# and how are they used?
64. How do you create your own namespaces in C#?
65. Explain the concept of access specifiers in C#.
66. What is the difference between public, private, protected, and internal in C#?
67. How do you handle naming conflicts in C# namespaces?
68. What is exception handling in C#?
69. Explain the try-catch-finally block in C#.
70. How do you handle multiple exceptions in C#?
71. What is the difference between throw and throw ex in C#?
72. How do you create custom exceptions in C#?
73. Explain the concept of exception filters in C#.
74. What is an enum in C# and how is it used?
75. Explain the concept of collections in C#.
76. How do you create a List in C#?
77. What are the different methods available in the List class in C#?
78. Explain the concept of dictionaries in C#.
79. How do you add and retrieve elements from a dictionary in C#?
80. What is the difference between List and Array in C#?
81. What is LINQ in C#?
82. Explain the different types of LINQ queries in C#.
83. How do you use LINQ to query objects in C#?
84. What is the purpose of the 'var' keyword in LINQ?
85. Explain the concept of deferred execution in LINQ.
86. How do you perform sorting and filtering using LINQ in C#?

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