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  • OOPS Concepts - General Questions
11. 

Why reference is not same as a pointer?
A. A reference can never be null.
B. A reference once established cannot be changed.
C. Reference doesn't need an explicit dereferencing mechanism.
D. All of the above.
12. 

cout is a/an __________ .
A. operator
B. function
C. object
D. macro
13. 

Which of the following concepts provides facility of using object of one class inside another class?
A. Encapsulation
B. Abstraction
C. Composition
D. Inheritance
14. 

How many types of polymorphisms are supported by C++?
A. 1
B. 2
C. 3
D. 4
15. 

Which of the following is an abstract data type?
A. int
B. double
C. string
D. Class