Question Answer

1. C# class can inherit multiple ________
Ans: Interface
2. Which of the followings are value types in C#?
Ans: 

1. Int32
2. Double
3. Decimal

3. Which of the following is a reference type in C#?

Ans: String

4. What is Nullable type?

Ans: It allows assignment of null to value type.

5. Struct is a _____.

Ans: Value type

6. 10 > 9 ? “10 is greater than 9” : “9 is greater than 10” is an example of _______

Ans: Ternary operator

7. Which of the following datatype can be used with enum?

Ans: Int

8. What is indexer?

Ans: It allows an instance of a class to be indexed like an array

9. String data type is ______.

Ans: Immutable

10. An array in C# starts with _____ index.

Ans: Zero

11. Which of the following is right way of declaring an array?

Ans: Int[] intArray = new int[5];

12. Which of the following is true for ReadOnly variables?

Ans: Value will be assigned at runtime.

13. Which of the following statement is true?

Ans: 

1. try block must be followed by catch and finally block.
2. try block must be followed by catch or finally block or both.
3. try block can include another try block.

14. Which of the following statement is true?

Ans: A finally block cannot include return or break keyword.

15. Func and Action are the types of ______.

Ans: Delegate

16. Return type of Predicate <T>() is always a ______.

Ans: Boolean

17. A partial class allows ________

Ans: Implementation of single class in multiple .cs files.

18. LINQ stands for ________.

Ans: Language Integrated Query

19. Data type of a variable declared using var will be assigned at _______.

Ans: Compile time

20. Which of the following is true for dynamic type in C#?

Ans: It escapes compile time type checking