Constructors and Destructors

1.

Which of the following statement is correct whenever an object goes out of scope?

A.	The default constructor of the object is called.
B.	The parameterized destructor is called.
C.	The default destructor of the object is called.
D.	None of the above.

Answer: Option C

Explanation:

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2.

Which of the following statement is correct about constructors?

A.	A constructor has a return type.
B.	A constructor cannot contain a function call.
C.	A constructor has no return type.
D.	A constructor has a void return type.

Answer: Option C

Explanation:

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3.

To ensure that every object in the array receives a destructor call, always delete memory allocated as an array with operator __________ .

A.	destructor
B.	delete
C.	delete[]
D.	kill[]
E.	free[]

Answer: Option C

Explanation:

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4.

Which of the following gets called when an object is being created?

A.	constructor
B.	virtual function
C.	destructor
D.	main

Answer: Option A

Explanation:

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5.

How many times a constructor is called in the life-time of an object?

A.	Only once
B.	Twice
C.	Thrice
D.	Depends on the way of creation of object

Answer: Option A

Explanation:

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6.

Which of the following statements are correct?

A.	Constructor is always called explicitly.
B.	Constructor is called either implicitly or explicitly, whereas destructor is always called implicitly.
C.	Destructor is always called explicitly.
D.	Constructor and destructor functions are not called at all as they are always inline.

Answer: Option B

Explanation:

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7.

Which of the following statement is correct

A.	A constructor of a derived class can access any public and protected member of the base class.
B.	Constructor cannot be inherited but the derived class can call them.
C.	A constructor of a derived class cannot access any public and protected member of the base class.
D.	Both A and B.

Answer: Option D

Explanation:

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8.

Destructors __________ for automatic objects if the program terminates with a call to function exit or function abort.

A.	are called
B.	are inherited
C.	are not called
D.	are created

Answer: Option C

Explanation:

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