Interview Questions and Answers for OOPs Most Popular
A company’s most valuable skill is the ability to use Object Oriented Programming languages like C++, Java, and Python. There are many ways for candidates to expand their OOPs knowledge and excel at the OOPs interview questions.
Object Oriented Programming is a way to implement a programming language model that revolves around objects, rather than logic and procedural programming. OOP is built around objects that interact with each other.
We have compiled the best answers to the most frequently asked OOPs interview questions.
List of Top OOP Interview Questions and Answers in 2022
It is a good idea to read through the sample OOPs interview questions, and answer questions.
This comprehensive segment contains the OOPs interview questions. These questions will help you prepare for the next Object Oriented Programming interview.
How to prepare for OOPs viva questions is something you should be concerned about. Here’s a list of the top OOP interview questions and answers.
Basic OOPs Interview Questions & Answers
Here are the answers to the basic OOPs interview questions for professionals and beginners.
1) What is Object-Oriented Programming?
OOPs can be abbreviated to ‘Object Oriented Programming Systems’. Object-Oriented Programming Languages are programming languages that execute objects or related processes using the Object-Oriented Programming paradigm, also known as OOPs.
Popular object-oriented programming languages include Java, Python and C++.
2) What are the major Object Oriented Programming Languages?
Some of the most important Object-Oriented Programming Languages include:
– C++
Java
Javascript
– Python
– PHP, and many other.
3) What are the main characteristics of OOPs?
These are the main characteristics of OOPs.
Data Abstraction
– Encapsulation
– Inheritance
– Polymorphism
4) What are the core concepts behind OOPS?
The core concepts of OOPS are:
– Abstraction
– Association
– Aggregation
– Composition
– Encapsulation
– Inheritance
– Polymorphism
5) What is an object?
An object is an object-oriented system’s basic run-time entity. It is an instance or class, and can be used to create any number of instances. It is unique in its state, behavior, identity, and identity. A class is a pre-defined or user-defined template that creates objects.
6) What types of Inheritance are there in OOPS
These are the different types of inheritances available in OOps:
– One Inheritance
– Multiple Inheritance
Multi-level Inheritance
– Multi-path Inheritance
– Hierarchical Inheritance
– Hybrid Inheritance
Suggested Reading: C# Interview Questions and Answers – UPDATED 2020
Advanced OOPs Interview Questions & Answers
Below are the OOPs interview question for advanced level freshers.
1) What are the 7 OOPs concepts you’re referring to?
The four fundamental principles of object-oriented programming include abstraction, encapsulation and inheritance.
Java supports three additional OOP concepts: aggregation and association.
2) What is Structured programming?
Structured programming refers to a method of program development that produces high-quality programs with a clear control flow.
This method demonstrates an approach that makes it simple to test, maintain and modify, as well as debug.
Programming paradigms typically include structured programming using the OOPs model.
3) What is Encapsulation?
Encapsulation, as used in OOPs, refers to the binding of data and functions that define, manipulate and protect them from setters and getters. Encapsulation can be applied using access modifiers (public or private and protected).
You could, for example, make member variables private in a class and provide public setter and getter methods.
4) What is Polymorphism and How Does It Work?
Polymorphism derives its name from the Greek word poly, which means “many” and “morph”, which implies “form”.
Polymorphism in Object Oriented Programming is the process of representing one form, a property, a function, or object, in multiple forms.
It can be divided into two types:
Method Overloading (compile-time): Also known as static binding or early binding.
Method Overriding (run-time): Also known as dynamic binding or late binding.
5) What are multiple inheritances, and how do they work?
Multiple inheritances are an inheritance type in which a class inherits attributes or methods from more than one parent class or base class.
There are two levels of class: the base class and the derived classes.
6) What does the “IS-A”, “HAS-A”, and “IS-A” relationship mean?
The “IS-A”, or inheritance relationship, is the “IS-A”. The inheriting classes from t