OOPS Set 4

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Free Online Best OOPS MCQ Questions for improve your basic knowledge of C++. This OOPS Set 4 test that contains 25 Multiple Choice Questions with 4 options. You have to select the right answer to a question.

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Question 1

When a destructor is called?

A	After the end of object life
B	Anytime in between object’s lifespan
C	At end of whole program
D	Just before the end of object life

Question 2

Which among the following describes a destructor?

A	A special function that is called to free the resources, acquired by the object
B	A special function that is called to delete the class
C	A special function that is called anytime to delete an object
D	A special function that is called to delete all the objects of a class

Question 3

Which among the following is correct for a hierarchical inheritance?

A	One base class can be derived into only 2 classes
B	Two base classes can be used to be derived into one single class
C	Two or more classes can be derived into one class
D	One base class can be derived into other two derived classes or more

Question 4

How many types of access specifiers are provided in OOP (C++)?

A	1
B	2
C	3
D	4

Question 5

Which among the following is correct for abstract class destructors?

A	It doesn’t have destructors
B	It has destructors
C	It may or may not have destructors
D	It contains an implicit destructor

Question 6

Can constructors be overloaded in derived class?

A	Yes, always
B	Yes, if derived class has no constructor
C	No, programmer can’t do it
D	No, never

Question 7

Which programming language doesn’t support multiple inheritance?

A	C++ and Java
B	C and C++
C	Java and SmallTalk
D	Java

Question 8

Which among the following best describes polymorphism?

A	It is the ability for a message/data to be processed in more than one form
B	It is the ability for a message/data to be processed in only 1 form
C	It is the ability for many messages/data to be processed in one way
D	It is the ability for undefined message/data to be processed in at least one way

Question 9

If a class has all the private members, which specifier will be used for its implicit constructor?

A	Private
B	Default
C	Protected
D	Public

Question 10

Which among the following can restrict class members to get inherited?

A	Private
B	Protected
C	Public
D	All three

Question 11

Which among the following is false?

A	Private members can be accessed using friend functions
B	Member functions can be made private
C	Default members can’t be inherited
D	Public members are accessible from other classes also

Question 12

How many basic types of inheritance are provided as OOP feature?

A	4
B	3
C	2
D	1

Question 13

What do you call the languages that support classes but not polymorphism?

A	Class based language
B	Procedure Oriented language
C	Object-based language
D	If classes are supported, polymorphism will always be supported

Question 14

Which among the following is correct for multiple inheritance?

A	class student{public: int marks;}s; class stream{int total;}; class topper:public student, public stream{ };
B	class student{int marks;}; class stream{ }; class topper: public student{ };
C	class student{int marks;}; class stream:public student{ };
D	class student{ }; class stream{ }; class topper{ };

Question 15

Which among the following best defines single level inheritance?

A	A class inheriting a derived class
B	A class inheriting a base class
C	A class inheriting a nested class
D	A class which gets inherited by 2 classes

Question 16

Which among the following can be used together in a single class?

A	Only private
B	Private and Protected together
C	Private and Public together
D	All three together

Question 17

Which among the following best describes constructor overloading?

A	Defining one constructor in each class of a program
B	Defining more than one constructor in single class
C	Defining more than one constructor in single class with different signature
D	Defining destructor with each constructor

Question 18

Which among the following is called first, automatically, whenever an object is created?

A	Class
B	Constructor
C	New
D	Trigger

Question 19

Which among the following is not a necessary condition for constructors?

A	Its name must be same as that of class
B	It must not have any return type
C	It must contain a definition body
D	It can contains arguments

Question 20

Which among the following best describes the constructors?

A	A function which is called whenever an object is referenced
B	A function which is called whenever an object is created to initialize the members
C	A function which is called whenever an object is assigned to copy the values
D	A function which is called whenever an object is to be given values for members

Question 21

Which among the following best describes the Inheritance?

A	Copying the code already written
B	Using the code already written once
C	Using already defined functions in programming language
D	Using the data and functions into derived segment

Question 22

Which specifier allows a programmer to make the private members which can be inherited?

A	Private
B	Protected and Default
C	Protected
D	Public

Question 23

If class A has add() function with protected access, and few other members in public. Then class B inherits class A privately. Will the user will not be able to call _________ from the object of class B.

A	The add() function of class A
B	Any member of class A
C	Any function of class A
D	Private, protected and public members of class A

Question 24

Which among the following best describes destructor?

A	A function which is called just before the objects are destroyed
B	A function which is called after each reference to the object
C	A function which is called after termination of the program
D	A function which is called before calling any member function

Question 25

Which access specifier is used when no access specifier is used with a member of class (java)?

A	Private
B	Default
C	Protected
D	Public

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