Java MCQ Set-4

1. Which of the following is not OOPS concept in java

(A) Inheritance
(B) Encapsulation
(C) Polymorphism
(D) Compilation

2. Which of these keywords is used to make a class

(A) Class
(B) Struct
(C) Int
(D) None of the mentioned

3. What is the return type of a method that does not return any value

(A) Int
(B) Float
(C) Void
(D) Double

4. Method having same name as its class name is

(A) Struct
(B) Enum
(C) Constructor
(D) Argument

5. Which method can be defined only once in a program

(A) Main method
(B) Finalize method
(C) Static method
(D) Private method

6. Size of an integer can be

(A) -2^31 to 2^31-1
(B) 0 to -2^16
(C) -2^8 to 2^8 -1
(D) -2^15 to 2^15 -1

7. Which of the following assignment operator doesn’t exist in java

(A) >>
(B) %=
(C) >>>
(D) <<

8. Which loop is always executed once

(A) For
(B) For each
(C) Do..while
(D) While

9. Which of the following is not valid flow control statement

(A) Break;
(B) Continue outer;
(C) Return;
(D) Exit();

10. A top level class may have which one of the following access modifiers

(A) Package
(B) Private
(C) protected
(D) public

11. A subclass in also called as

(A) Inner class
(B) Nested class
(C) Derived class
(D) Hidden class

12. Which of the following is not a wrapper class

(A) Vector
(B) Character
(C) Boolean
(D) Integer

13. A default constructor has

(A) No arguments
(B) Has no return type
(C) Has one argument but no return type
(D) Has two arguments

14. Math class belongs to the package

(A) Java.math
(B) Java.lang
(C) Java.util
(D) None of these

15. A package is a collection of

(A) Classes
(B) Interfaces
(C) Editing tools
(D) Class and interfaces

16. Primary purpose of inheritance is

(A) Code reuse
(B) Overloading
(C) Overriding
(D) None of the above

17. Which method/methods cannot be overridden

(A) Static
(B) Final
(C) Only (a)
(D) Both (a) and (b)

18. Which of the following does not deal with exceptions

(A) Throws
(B) Throw
(C) Finalize
(D) Finally

19. What is the default priority of a thread in java

(A) 10
(B) 5
(C) 3
(D) 1

20. The class at the top of the AWT hierarchy is

(A) Component
(B) Window
(C) Container
(D) Frame