Which is not a feature of OOP in general definitions?
a) Efficient Code
b) Code reusability
c) Modularity
d) Duplicate/Redundant data
Q.3.
Which was the first purely object oriented programming language developed?
a) Kotlin
b) SmallTalk
c) Java
d) C++
Q.4.
When OOP concept did first came into picture?
a) 1980’s
b) 1995
c) 1970’s
d) 1993
Q.5.
Which feature of OOP indicates code reusability?
a) Abstraction
b) Polymorphism
c) Encapsulation
d) Inheritance
Q.6.
Which header file is required in C++ to use OOP?
a) OOP can be used without using any header file
b) stdlib.h
c) iostream.h
d) stdio.h
Q.7.
Why Java is Partially OOP language?
a) It allows code to be written outside classes
b) It supports usual declaration of primitive data types
c) It does not support pointers
d) It doesn’t support all types of inheritance
Q.8.
Which among the following doesn’t come under OOP concept?
a) Data hiding
b) Message passing
c) Platform independent
d) Data binding
Q.9.
Which is the correct syntax of inheritance?
a) class base_classname :access derived_classname{ /*define class body*/ };
b) class derived_classname : access base_classname{ /*define class body*/ };
c) class derived_classname : base_classname{ /*define class body*/ };
d) class base_classname : derived_classname{ /*define class body*/ };
Q.10.
Which of the following is not a property of an object?
a) Properties
b) Names
c) Identity
d) Attributes
Q.11.
Which feature of OOP is indicated by the following code?
class student{ int marks; };
class topper:public student{ int age; topper(int age){ this.age=age; } };
a) Encapsulation and Inheritance
b) Inheritance and polymorphism
c) Polymorphism
d) Inheritance
Q.12.
The feature by which one object can interact with another object is _____________
a) Message reading
b) Message Passing
c) Data transfer
d) Data Binding
Q.13.
Which among the following, for a pure OOP language, is true?
a) The language should follow at least 1 feature of OOP
b) The language must follow only 3 features of OOP
c) The language must follow all the rules of OOP
d) The language should follow 3 or more features of OOP
Q.14.
How many types of access specifiers are provided in OOP (C++)?
a) 4
b) 3
c) 2
d) 1
Q.15.
In multilevel inheritance, which is the most significant feature of OOP used?
a) Code efficiency
b) Code readability
c) Flexibility
d) Code reusability
Q.16.
What is encapsulation in OOP?
a) It is a way of combining various data members and member functions that operate on those data members into a single unit
b) It is a way of combining various data members and member functions into a single unit which can operate on any data
c) It is a way of combining various data members into a single unit
d) It is a way of combining various member functions into a single unit
Q.17.
Which of the following is not true about polymorphism?
a) Helps in redefining the same functionality
b) Increases overhead of function definition always
c) It is feature of OOP
d) Ease in readability of program
Q.18.
Which constructor will be called from the object created in the below C++ code?
class A
{
int i;
A()
{
i=cout<<i;
}
A(int x= {
i=x; cout<<I;
}
};
A obj1;
a) Parameterized constructor
b) Default constructor
c) Run time error
d) Compile time error
Q.19.
What is an abstraction in object-oriented programming?
a) Hiding the implementation and showing only the features
b) Hiding the important data
c) Hiding the implementation
d) Showing the important data
Q.20.
Which among the following can show polymorphism?
a) Overloading &&
b) Overloading <<
c) Overloading ||
d) Overloading +=
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