Inheritence - C++ Multiple Choice Questions(MCQs)& Answers

Questions
21 A member declared as ………….. is accessible by the member functions within its class and any class immediately derived from it.
A protected
B privates
C public
D friend

Answer: Option [A]
22 When the base class is publicly inherited, public members of the base class become …………. of the derived class.
A private members
B protected members
C Public members
D Not inherite

Answer: Option [C]
23 In protected derivation, both the public and protected members of the base class become …………. members of the derived class.
A protected
B private
C public
D friend

Answer: Option [A]
24 What will be the order of execution of base class constructors in the following method of inheritance.

class A: public B, public C {….};

What will be the order of execution of base class constructors in the following method of inheritance.

class A: public B, virtual public C {….};

A B(); C(); A();
B C(); B(); A();
C A(); B(); C();
D B(); A(); C();

Answer: Option [A]
25 What will be the order of execution of base class constructors in the following method of inheritance. class A: public B, virtual public C {….};
A B(); C(); A();
B C(); B(); A();
C A(); B(); C();
D B(); A(); C();

Answer: Option [B]
26 While the friend functions and the member functions of a friend class can have direct access to both the private and protected data, the member functions of a derived class can directly access only the ………… data.
A protectedd
B derived, base
C public
D friend

Answer: Option [A]
27 In ……………………. inheritance, the constructors are executed in the order of inheritance.
A multipath
B multiple
C multilevel
D hierarchical

Answer: Option [C]
28 In ……………….. inheritance, the base classes are constructed in the order in which they appear in the deceleration of the derived class.
A multipath
B multiple
C private
D multilevel

Answer: Option [B]
29 ……………….. inheritance may lead to duplication of inherited members from a ‘grandparent’ base class.
A multipath
B multiple
C multilevel
D hierarchical

Answer: Option [A]
30 The member functions of a derived class can directly access only the ……………….. data.
A private and protected
B private and public
C protected and public
D private, protected and public

Answer: Option [C]
31 The friend functions and the member functions of a friend class can directly access the ………………. data.
A private and protected
B private and public
C protected and public
D private, protected and public

Answer: Option [A]
32 In compile time polymorphism, compiler is able to select the appropriate function for a particular call at the compile time itself, which is known as …………
A early binding
B static binding
C static linking
D All of the above

Answer: Option [B]
33 . ……………. binding means that, an object is bound to its function call at compile time.
A late
B static
C dynamic
D fixed

Answer: Option [B]
34 C++ supports run time polymorphism with the help of virtual functions, which is called …………….. binding.
A dynamic
B run time
C early binding
D static

Answer: Option [A]
35 State whether the following statements about pointers in C++ are True. i) A pointer can be incremented (++) or decremented (–) ii) Any integer can be added to or subtracted from a pointer iii) One pointer can be subtracted from another)
A i and ii only
B ii and iii only
C i and iii only
D All i, ii and iii

Answer: Option [D]
36 . ………………. are also known as generic pointers, which refer to variables of any type.
A void pointers
B null pointers
C this pointer
D base pointer

Answer: Option [A]
37 The pointers which are not initialized in a program are called ……………..
A void pointers
B null pointers
C this pointer
D base pointer

Answer: Option [B]
38 …………………… is useful in creating objects at run time.
A void pointer
B null pointer
C this pointer
D object pointerd

Answer: Option [D]
39 A …………………. refers to an object that that currently invokes a member function.
A void pointers
B null pointers
C this pointer
D base pointer

Answer: Option [C]
40 The …………………. cannot be directly used to access all the members of the derived class.
A void pointers
B null pointers
C this pointer
D base pointern

Answer: Option [D]
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