OOPS Set 2

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Free Online Best OOPS MCQ Questions for improve your basic knowledge of C++. This OOPS Set 2 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

Which feature allows open recursion, among the following?

A	Use of this pointer
B	Use of pointers
C	Use of pass by value
D	Use of parameterized constructor

Question 2

Which concept of OOP is false for C++?

A	At least one object should be declared in code
B	Code can be written without using classes
C	Code must contain at least one class
D	A class must have member functions

Question 3

Which of the following best defines a class?

A	Parent of an object
B	Instance of an object
C	Blueprint of an object
D	Scope of an object

Question 4

The object can’t be __________

A	Passed by reference
B	Passed by value
C	Passed by copy
D	Passed as function

Question 5

Which was the first purely object oriented programming language developed?

A	Java
B	C++
C	SmallTalk
D	Kotlin

Question 6

Which header file is required in C++ to use OOP?

A	iostream.h
B	stdio.h
C	stdlib.h
D	OOP can be used without using any header file

Question 7

Why Java is Partially OOP language?

A	It supports usual declaration of primitive data types
B	It doesn’t support all types of inheritance
C	It allows code to be written outside classes
D	It does not support pointers

Question 8

What is default access specifier for data members or member functions declared within a class without any specifier, in C++?

A	Private
B	Protected
C	Public
D	Depends on compiler

Question 9

Which of the two features match each other?

A	Inheritance and Encapsulation
B	Encapsulation and Polymorphism
C	Encapsulation and Abstraction
D	Abstraction and Polymorphism

Question 10

Class is pass by _______

A	Value
B	Reference
C	Value or Reference, depending on program
D	Copy

Question 11

Which of the following is incorrect?

A	class student{ }s;
B	class student{ }; student s;
C	class student{ }s[];
D	class student{ }; student s[5];

Question 12

When OOP concept did first came into picture?

A	1970’s
B	1980’s
C	1993
D	1995

Question 13

Which is most appropriate comment on following class definition? class Student { int a; public : float a; };

A	Error : same variable name can’t be used twice
B	Error : Public must come first
C	Error : data types are different for same variable
D	It is correct

Question 14

What is size of the object of following class (64 bit system)? class student { int rollno; char name[20]; static int studentno; };

A	20
B	22
C	24
D	28

Question 15

What is the additional feature in classes that was not in structures?

A	Data members
B	Member functions
C	Static data allowed
D	Public access specifier

Question 16

Which is known as a generic class?

A	Abstract class
B	Final class
C	Template class
D	Efficient Code

Question 17

Which Feature of OOP illustrated the code reusability?

A	Polymorphism
B	Abstraction
C	Encapsulation
D	Inheritance

Question 18

How many objects can be declared of a specific class in a single program?

A	32768
B	127
C	1
D	As many as you want

Question 19

Which among the following is false?

A	Object must be created before using members of a class
B	Memory for an object is allocated only after its constructor is called
C	Objects can’t be passed by reference
D	Objects size depends on its class data members

Question 20

How many classes can be defined in a single program?

A	Only 1
B	Only 100
C	Only 999
D	As many as you want

Question 21

Which language does not support all 4 types of inheritance?

A	C++
B	Java
C	Kotlin
D	Small Talk

Question 22

Who invented OOP?

A	Alan Kay
B	Andrea Ferro
C	Dennis Ritchie
D	Adele Goldberg

Question 23

Which of the following is not type of class?

A	Abstract Class
B	Final Class
C	Start Class
D	String Class

Question 24

Which is not feature of OOP in general definitions?

A	Code reusability
B	Modularity
C	Duplicate/Redundant data
D	Efficient Code

Question 25

Which definition best describes an object?

A	Instance of a class
B	Instance of itself
C	Child of a class
D	Overview of a class

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