Explore topic-wise MCQs in Object Oriented Programming.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Object Oriented Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

Why temporary object is not created in return by reference?

A. Because compiler can’t create temporary objects
B. Because the temporary object is created within the function
C. Because return by reference just make the objects points to values memory location
D. Because return by reference just make the object point to null
Answer» D. Because return by reference just make the object point to null
Discussion
2.

If an object is being returned by value then __________________________

A. Its member values are made constant
B. Its member values have to be copied individually
C. Its member values are not used
D. Its member values are copied using copy constructor
Answer» E.
Discussion
3.

If an object is passed by reference to a function then it must be returned by reference.

A. True
B. False
Answer» C.
Discussion
4.

Can we return an array of objects?

A. Yes, always
B. Ye, only if objects are having same values
C. No, because objects contain many other values
D. No, because objects are single entity
Answer» B. Ye, only if objects are having same values
Discussion
5.

If object is passed by reference ____________________

A. Temporary object is created
B. Temporary object is created inside the function
C. Temporary object is created for few seconds
D. Temporary object is not created
Answer» E.
Discussion
6.

Which error will be produced if a local object is returned by reference outside a function?

A. Out of memory error
B. Run time error
C. Compile time error
D. No error
Answer» D. No error
Discussion
7.

How many independent objects can be returned at same time from a function?

A. 1
B. 2
C. 3
D. 4
Answer» B. 2
Discussion
8.

If an object is declared inside the function then ____________________ outside the function.

A. It can be returned by reference
B. It can’t be returned by reference
C. It can be returned by address
D. It can’t be returned at all
Answer» C. It can be returned by address
Discussion
9.

Which is the correct syntax for defining a function which passes an object by reference?

A. className& functionName ( )
B. className* functionName( )
C. className-> functionName( )
D. &className functionName()
Answer» B. className* functionName( )
Discussion
10.

Which is the correct syntax for returning an object by value?

A. void functionName ( ){ }
B. object functionName( ) { }
C. class object functionName( ) { }
D. ClassName functionName ( ){ }
Answer» E.
Discussion
11.

Where the temporary objects (created while return by value) are created?

A. Outside the function scope
B. Within the function
C. Inside the main function
D. Inside the calling function
E. are created?a) Outside the function scopeb) Within the functionc) Inside the main functiond) Inside the calling function
Answer» C. Inside the main function
Discussion
12.

Whenever an object is returned by value ____________________

A. A temporary object is created
B. Temporary object is not created
C. Temporary object may or may not be created
D. New permanent object is created
Answer» B. Temporary object is not created
Discussion
13.

In which of the following way(s) can the object be returned from a function?

A. Can only be returned by value
B. Can only be returned by reference
C. Can be returned either by value or reference
D. Can neither be returned by value nor by reference
Answer» D. Can neither be returned by value nor by reference
Discussion
14.

IF_OBJECT_IS_PASSED_BY_REFERENCE_____________________?$

A. Temporary object is created
B. Temporary object is created inside the function
C. Temporary object is created for few seconds
D. Temporary object is not created
Answer» E.
Discussion
15.

Can we return an array of objects?$

A. Yes, always
B. Ye, only if objects are having same values
C. No, because objects contain many other values
D. No, because objects are single entity
Answer» B. Ye, only if objects are having same values
Discussion
16.

Which_among_the_following_is_correct?$

A. Individual data members can’t be returned
B. Individual data members can be returned
C. Individual member functions can be returned from another function
D. Individual data members can only be passed by reference
Answer» C. Individual member functions can be returned from another function
Discussion