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Inheritence - C++ Multiple Choice Questions(MCQs)& Answers
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Free download in PDF c++ inheritence Multiple Choice Questions(MCQs) & Answers. These multiple choice questions on Computer Science are very useful for NIELIT, BCA, B.Sc. MCA, M.Sc. B.Tech, M.Tech, BE, ME students an interview for various positions like Web Developer, System Analyst etc.
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41 Run time polymorphism is achieved only when a ……………….. is accessed through a pointer to the base class.
[A] member function
[B] virtual function
[C] static function
[D] real function
Answer: Option [B]
42 If a ……………………… is defined in the base class, it need not be necessarily redefined in the derived class.
[A] member function
[B] virtual function
[C] static function
[D] real function
Answer: Option [B]
43 …………………………. is a function declared in a base class that has no definition relative to the base class.
[A] member function
[B] virtual function
[C] pure virtual function
[D] pure function
Answer: Option [B]
44 State whether the following statements about virtual functions are True or False.

i) A virtual function, equated to zero is called pure virtual function.

ii) A class containing pure virtual function is called an abstract class

[A] True, True
[B] True, False
[C] False, True
[D] False, False
Answer: Option [A]
45 The main objective of an abstract base class is to provide some traits to the derived class and to create a ………………………. required for achieving run time polymorphism.
[A] void pointers
[B] null pointers
[C] this pointer
[D] base pointer
Answer: Option [D]
46 . State whether the following statements about virtual functions is/are True. i) The virtual function must be member of some class ii) virtual functions cannot be static members iii) A virtual function can not be a friend of another class.
[A] i and ii only
[B] ii and iii only
[C] i and iii only
[D] All i, ii and iii
Answer: Option [A]
47 The important application of ………………… is to return the object it points to.
[A] void pointers
[B] null pointers
[C] this pointer
[D] base pointer
Answer: Option [C]
48 The pointer to function is known as …………………. function.
[A] forward
[B] pointer
[C] callback
[D] backward
Answer: Option [C]
49 We can manipulate a pointer with the indirection operator (*), which is also known as ……………………
[A] reference operator
[B] dereference operator
[C] direction operator
[D] indirection operator
Answer: Option [B]
50 Using the ………………………., we can change the contents of the memory location.
[A] reference operator
[B] dereference operator
[C] direction operator
[D] indirection operator
Answer: Option [B]
51 If we attempt to dereference an uninitialized pointer, it will ………………….. by referring to any other location in memory.
[A] cause compile time error
[B] run time error
[C] cause run time error
[D] executes
Answer: Option [C]
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