250+ TOP MCQs on Member Functions and Answers

Answer: c
Clarification: For overloading those operators for a class, the class must use non-static member function so that doesn’t remain common to all the objects, and each object can use it independently. The friend functions is also restricted so as to keep the security of data.

9. If a virtual member function is defined ___________
a) It should not contain any body and defined by subclasses
b) It must contain body and overridden by subclasses
c) It must contain body and be overloaded
d) It must not contain any body and should not be derived
Answer: a
Clarification: The virtual functions are defined using virtual keyword. These are made in order to make all the classes to define them as the class gets inherited. Increases code understanding.

10. Member functions of a generic class are _____________
a) Not generic
b) Automatically generic
c) To be made generic explicitly
d) Given default type as double
Answer: b
Clarification: When generic type is used in a class, the functions are automatically generic. This is so because the functions would use the same type as defined to make the class generic. The functions will get to know the type of data as soon as the generic class is used. It’s inbuilt feature.

11. Member function of a class can ____________
a) Access all the members of the class
b) Access only Public members of the class
c) Access only the private members of the class
d) Access subclass members
Answer: a
Clarification: The member functions has access to all the members of the class. Whenever data members of a class, which might be private, have to be modified, we make use of these member functions. This is more secure way to manipulate data.

12. Which among the following is proper syntax for class given below?

class A
{ 
	int a,b;
	public : void disp();
}

a) void disp::A(){ }
b) void A::disp(){ }
c) void A:disp() { cout<d) void disp:A(){ cout<Answer: b
Clarification: The syntax in option void A::disp(){ } is correct. We use scope resolution to represent the member function of a class and to write its definition. It is not necessary for a function to have anything in its definition.

13. A member function can _______________ of the same class.
a) Call other member functions
b) Call only private member functions
c) Call only static member functions
d) Call only const member functions
Answer: a
Clarification: We can call one function inside another function to access some data of class. A public member function can be used to call a private member function which directly manipulates the private data of class.

14. Which member function doesn’t require any return type?
a) Static
b) Constructor
c) Const
d) Constructor and destructor
Answer: d
Clarification: All the member functions work same as normal functions with syntax. But the constructor and destructor are also considered as member functions of a class, and they never have any data type.

15. Which among the following is not possible for member function?
a) Access protected members of parent class
b) Definition without return type
c) Access public members of subclass
d) Access static members of class
Answer: c
Clarification: A member function of a class can only have the access to the members of its own class and parent classes if inheritance used. Otherwise a member function can never access the members of a subclass. Accessing static members of a class is possible by normal and static member functions.