OOPs Interview Questions
Object-oriented programming (OOPs) is a programming paradigm that is based on
the concept of objects rather than just functions and procedures. It is the most popular
methodology among developers.
Nowadays tech giants demanding and hiring who has expertise in object-
oriented approaches and patterns and conducting interviews for the same. The
advantage of hiring such candidates is that they can also learn other OOP languages
easily as per organization requirements. Since, going through the section, you can
increase your chance to get hire by companies if you have well prepared for OOPs
interview questions.
In this section, we have collected some commonly asked OOPs interview
questions for both fresher and experienced. It can help you to crack the interview to
get your dream job.
1) What do you understand by OOP?
OOP stands for object-oriented programming. It is a programming paradigm that
revolves around the object rather than function and procedure. In other words, it is an
approach for developing applications that emphasize on objects. An object is a real
word entity that contains data and code. It allows binding data and code together.
2) Name any seven widely used OOP languages.
,There are various OOP languages but the most widely used are:
o Python
o Java
o Go
o Dart
o C++
o C#
o Ruby
3) What is the purpose of using OOPs concepts?
The aim of OOP is to implement real-world entities like inheritance, hiding,
polymorphism in programming. The main purpose of OOP is to bind together the data
and the functions that operate on them so that no other part of the code can access
this data except that function.
4) What are the four main features of OOPs?
The OOP has the following four features:
o Inheritance
o Encapsulation
o Polymorphism
o Data Abstraction
, 5) Why OOP is so popular?
OOPs, programming paradigm is considered as a better style of programming. Not
only it helps in writing a complex piece of code easily, but it also allows users to handle
and maintain them easily as well. Not only that, the main pillar of OOPs - Data
Abstraction, Encapsulation, Inheritance, and Polymorphism, makes it easy for
programmers to solve complex scenarios. As a result of these, OOPs is so popular.
6) What are the advantages and disadvantages of OOP?
Advantages of OOP
o It follows a bottom-up approach.
o It models the real word well.
o It allows us the reusability of code.
o Avoids unnecessary data exposure to the user by using the abstraction.
o OOP forces the designers to have a long and extensive design phase that results
in better design and fewer flaws.
o Decompose a complex problem into smaller chunks.
Object-oriented programming (OOPs) is a programming paradigm that is based on
the concept of objects rather than just functions and procedures. It is the most popular
methodology among developers.
Nowadays tech giants demanding and hiring who has expertise in object-
oriented approaches and patterns and conducting interviews for the same. The
advantage of hiring such candidates is that they can also learn other OOP languages
easily as per organization requirements. Since, going through the section, you can
increase your chance to get hire by companies if you have well prepared for OOPs
interview questions.
In this section, we have collected some commonly asked OOPs interview
questions for both fresher and experienced. It can help you to crack the interview to
get your dream job.
1) What do you understand by OOP?
OOP stands for object-oriented programming. It is a programming paradigm that
revolves around the object rather than function and procedure. In other words, it is an
approach for developing applications that emphasize on objects. An object is a real
word entity that contains data and code. It allows binding data and code together.
2) Name any seven widely used OOP languages.
,There are various OOP languages but the most widely used are:
o Python
o Java
o Go
o Dart
o C++
o C#
o Ruby
3) What is the purpose of using OOPs concepts?
The aim of OOP is to implement real-world entities like inheritance, hiding,
polymorphism in programming. The main purpose of OOP is to bind together the data
and the functions that operate on them so that no other part of the code can access
this data except that function.
4) What are the four main features of OOPs?
The OOP has the following four features:
o Inheritance
o Encapsulation
o Polymorphism
o Data Abstraction
, 5) Why OOP is so popular?
OOPs, programming paradigm is considered as a better style of programming. Not
only it helps in writing a complex piece of code easily, but it also allows users to handle
and maintain them easily as well. Not only that, the main pillar of OOPs - Data
Abstraction, Encapsulation, Inheritance, and Polymorphism, makes it easy for
programmers to solve complex scenarios. As a result of these, OOPs is so popular.
6) What are the advantages and disadvantages of OOP?
Advantages of OOP
o It follows a bottom-up approach.
o It models the real word well.
o It allows us the reusability of code.
o Avoids unnecessary data exposure to the user by using the abstraction.
o OOP forces the designers to have a long and extensive design phase that results
in better design and fewer flaws.
o Decompose a complex problem into smaller chunks.
