OOPS Interview questions

OOPS Interview questions?and answers for freshers and experienced – Answers to?object oriented programming interview questions: What is?OOP?, What are the various elements of?OOP?,Explain an object, class and Method, Define Encapsulation and Information Hiding in?OOP, Explain Inheritance and Polymorphism in?OOP, What are the advantages of?OOP?

What does OOPS stand for?

OOPs stands for Object Oriented Programming System.

Why is it preferred over structured programming?

It is easy to learn object oriented programming and additionally, it can handle complex questions that are beyond the scope of structured programming languages.

List the main features of Object Oriented Programming Systems?

  • Polymorphism
  • Encapsulation
  • Inheritance

Explain how each of the features you listed above works in OOPs

Encapsulation is a structure in OOPS that binds data and code together. The methods in a program that is based on OOPs act on the data with which they are bound together. In most languages, the class is basic unit of encapsulation.

Polymorphism is a feature in object oriented programs that allows a set of methods to be implemented in several applications.

Inheritance is basically, the process by which, a class acquires the properties of another class. This feature helps programmers to avoid duplicating code when they have an array of classes that implement the same methods.

Define abstraction

It is the future by which complex programs are managed by only showing only the relevant details that are required by the user. The user only gets to use the interface of the program without worrying over the complexity of the underlying concepts and methods.

Give three examples of programming languages that are based on Object Oriented Programming system.

  • Java
  • C++
  • C ##

State a few benefit of OOPs

  • Data and code are bound together to by encapsulation, which is beneficial to programmers who would like to build secure programs.
  • It allows code to be reused through inheritance and therefore reduces occurrences of duplication
  • It is simple to understand the syntaxes of Object Oriented Programs.

Briefly discuss the origin of object oriented programming

The term was first coined by Allan Kay when he created small talk. He was after a program in which objects communicate with each other through code.

What is a class?

A class is a template that can be used to create an object by defining the terms of that object.

What is an object?

An object is an instance of a class that is governed own properties that include a state, behavior, and unique identity.