OOPS DOTNET Interview Questions and Answers for C#.net

OOPS DOTNET Interview Questions and Answers

Before going to below questions C#.Net, ASP.NET, SQL Server, JQuery Interview questions my help you. 

1. Define OOPS?
2. What is class in OOPS? What is Base class?
3. What is Encapsulation in C#.Net?
4. What is Inheritance in C#.net?
5. What is an object?
6. What is Class member?
7. What is polimorphism in C#.net OOPS?
8. Types of Polimorphism in C#.net OOPS?
9. When we have to use Abstract class in C#.Net OOPS?
10. When we have to use interfaces in C#.Net OOPS?
11. What is property  in C#.Net OOPS ?
12. What is event in OOPS  in C#.Net OOPS ?
13. What is an Access modifier  in C#.Net OOPS ?
14. How many types of access modifiers are there in C#.Net? Explain briefly?
15. What is an Access specifier  in C#.Net OOPS ?
16. How many types of access specifiers are there in OOPS? Explain briefly?
17. What is mean by overloading in C#.NET OOPS? Explain overloads and overload as well?
18. Where we will use shared keyword?
19. What is static field  in C#.Net OOPS ?
20. What is static method  in C#.Net OOPS ?
21. What is new modifiers  in C#.Net OOPS ?
22. When to use interface over abstract class  in C#.Net OOPS ?
23. What is virtual keyword  in C#.Net OOPS ?
24. What is pure virtual function  in C#.Net OOPS ?
25. Can we customize access modifiers for explicitly implemented interface method  in C#.Net OOPS ?
26. Where we will use virtual keyword in c#.net oops?
27. What is private constructor in c#.net oops?
28. What is Public access modifier in C#.Net OOPS?
29. What is protected access modifier in C#.Net OOPS?
30. What is private access modifier in C#.Net OOPS?
31. What is internal access modifier in C#.Net OOPS?
32. What is protected internal access modifier in C#.Net OOPS?
33. Write one example for implementing encapsulation?
34. What is overloading in C#.Net OOPS?
35. What is method overloading in C#.Net OOPS?
36. Can we call base class with out creating an object in C#.Net OOPS??
37. What is difference between new and override keyword?
38. Can we declare private class in namespace?
39. Where we will use private constructor give me one example?
40. What is lazy instantiation in c#.net OOPS?
41. What is constructor in c#.net oops?
42. What is static Constructor? 
43. Where we will use static constructor?
44. What is constructor overloading in c#.net oops?
45. What is new keyword n c#.net oops?
46. Difference between normal constructor and static constructor?
47. How many types of classes are there in c#.net oops?
48. What is Concrete class in c#.net oops? 
49. where we will use concrete class in c#.net oops?
50. What is sealed class in c#.net oops?
51. Where we will use sealed class in c#.net oops?
52. What is static class in c#.net oops?
53. Where we will use static class in c#.net oops?
54. What is partial class in c#.net oops?
55. Where we will use partial class in c#.net oops?
56. What is Abstract Class in c#.net oops?
57. Can we prevent class from inheritance in C#.Net OOPS?
58. My class should inherite but how to prevent method from over ridden in C#.Net OOPS?
59. Can we write access modifiers for interface methods?if not, why?
60. can we initialized static members inside constructor in C#.Net OOPS?
61. What is this keyword?
62. Sealed and static Class Differences in C#.Net OOPS?
63. Structure and class difference in C#.Net OOPS?
64. Can we have abstract class with out any abstract method in C#.Net OOPS?
65. Can we have two or more methods for one .cs file?
66. How composition works in C#.Net OOPS?
67. What is default access modifier for class in C#.Net OOPS?
68. What is default access modifier for class method in C#.Net OOPS?
69. What is default access modifier for interface in C#.Net OOPS?
70. What is default access modifier for static class  in C#.Net OOPS?
71. What is default access modifier for class properties and fields  in C#.Net OOPS?
72. What is default access modifier for struct  in C#.Net OOPS?
73. What is default access modifier for delegate  in C#.Net OOPS?
74. What is default access modifier for enum in C#.Net OOPS?
75. What is struct default access modifier in C#.Net OOPS?
76. What is default access modifier for variable in the class?
77. Where we will use Abstract class in c#.net oops?
78. What is delegate? 
79. Can we override private virtual methods?
80. Write one example for delegate?
81. What is serialization?
82. What is the use of serializable attribute?
83. What is an interface in c#.net oops?
84. How to implement interface in c#.net oops?
85. What is explicit interface in c#.net oops?
86. What is implicit interface in c#.net oops?
87. Which is fast interface or Abstract Class?
88. What is difference between Abstract class and interface?
89. What is encapsulation in C#.Net OOPS?
90. What is early binding in C#.Net OOPS?
91. What is late binding  in C#.Net OOPS?
92. Difference between overloading and overriding?
93. Can we declare override method as static, while the original method is non-static?
94. What is indexers in C#.Net OOPS?
95. What is shared methods in C#.Net OOPS?
96. What is object initializer in C#.Net OOPS?
97. What is inheritance in C#.Net OOPS?
98. What is abstraction in C#.Net OOPS?
99. What are attributes in C#.Net OOPS?
100. What are types of constructors?
101. What is default constructor in c#.net?
102. What is parameterized Constructor?
103. What is copy constructor in C#.Net?
104. What are C#.NET 2.0 Features?
105. What are C#.NET 3.0 Features?
106. What are C#.NET 4.0 Features?

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