Constructors and Destructors problems
- 1. Destructors __________ for automatic objects if the program terminates with a call to function exit or function abort.
Options- A. are called
- B. are inherited
- C. are not called
- D. are created Discuss
Correct Answer: are not called
- 2. A class's __________ is called when an object is destroyed.
Options- A. constructor
- B. destructor
- C. assignment function
- D. copy constructor Discuss
Correct Answer: destructor
- 3. Destructor calls are made in which order of the corresponding constructor calls?
Options- A. Reverse order
- B. Forward order
- C. Depends on how the object is constructed
- D. Depends on how many objects are constructed Discuss
Correct Answer: Reverse order
- 4. A constructor that accepts __________ parameters is called the default constructor.
Options- A. one
- B. two
- C. no
- D. three Discuss
Correct Answer: no
- 5. Which of the following statement is incorrect?
Options- A. Constructor is a member function of the class.
- B. The compiler always provides a zero argument constructor.
- C. It is necessary that a constructor in a class should always be public.
- D. Both B and C. Discuss
Correct Answer: Both B and C.
- 6. What happens when a class with parameterized constructors and having no default constructor is used in a program and we create an object that needs a zero-argument constructor?
Options- A. Compile-time error.
- B. Preprocessing error.
- C. Runtime error.
- D. Runtime exception. Discuss
Correct Answer: Compile-time error.
- 7. A function with the same name as the class, but preceded with a tilde character (~) is called __________ of that class.
Options- A. constructor
- B. destructor
- C. function
- D. object Discuss
Correct Answer: destructor
- 8. A union that has no constructor can be initialized with another union of __________ type.
Options- A. different
- B. same
- C. virtual
- D. class Discuss
Correct Answer: same
- 9. If the copy constructor receives its arguments by value, the copy constructor would
Options- A. call one-argument constructor of the class
- B. work without any problem
- C. call itself recursively
- D. call zero-argument constructor Discuss
Correct Answer: call itself recursively
- 10. Copy constructor must receive its arguments by __________ .
Options- A. either pass-by-value or pass-by-reference
- B. only pass-by-value
- C. only pass-by-reference
- D. only pass by address Discuss
Correct Answer: only pass-by-reference
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