OOPS Concepts in Java with Examples - Wikitechy https://www.wikitechy.com/interview-questions/tag/oops-concepts-in-java-with-examples/ Interview Questions Thu, 18 Aug 2022 07:54:16 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png OOPS Concepts in Java with Examples - Wikitechy https://www.wikitechy.com/interview-questions/tag/oops-concepts-in-java-with-examples/ 32 32 How OOPS concept is achieved in Java ? https://www.wikitechy.com/interview-questions/java/how-oops-concept-is-achieved-in-java/ https://www.wikitechy.com/interview-questions/java/how-oops-concept-is-achieved-in-java/#respond Tue, 13 Jul 2021 23:06:57 +0000 https://www.wikitechy.com/interview-questions/?p=625

How OOPS concept is achieved in Java

The following stages are the concept of oops achieved in Java,

  • Object
  • Class
  • Abstraction
  • Encaptulation
  • Inheritance
  • Polymorphism

Class:

  • A class is a set of objects which have common properties. It is a template or blueprint from which objects are created. In other term, a class is the group of objects showing same behavior will come under the same group.

Object:

  • The Object is the real-time entity having some state and behavior. In Java, Object is an example of the class having the instance variables like the state of the object and the methods as the behaviour of the object. The object of a class can be formed by using the new keyword in Java Programming language.

Abstraction:

  • It can be defined as the separation of unnecessary details or explanation from system requirements so as to reduce the complexities of understanding requirements.

Encapsulation:

  • It is a mechanism that puts the data and function together. It is the result of hiding implementation details of an object from its user.The object hides its data to de accessed by only those functions which are packed in the class of that object.

Inheritance:

  • It is the relationship between two classes of object such that one of the classes ,the child takes all the relevant features of other class the parent. Inheritance bring about reusability.
Class and Object

Polymorphism:

  • Polymorphism means having many forms that in a single entity can takes more than one form. Polymorphism is implemented through operator overloading and function overloading.
Class and Object
]]> https://www.wikitechy.com/interview-questions/java/how-oops-concept-is-achieved-in-java/feed/ 0 Which of the following concepts means wrapping up of data and functions together ? https://www.wikitechy.com/interview-questions/cpp/which-of-the-following-concepts-means-wrapping-up-of-data-and-functions-together/ https://www.wikitechy.com/interview-questions/cpp/which-of-the-following-concepts-means-wrapping-up-of-data-and-functions-together/#respond Mon, 12 Jul 2021 22:36:01 +0000 https://www.wikitechy.com/interview-questions/?p=376

Which of the following concepts means wrapping up of data and functions together ?

A. Abstraction

B. Encapsulation

C. Inheritance

D. None

Answer : B. Encapsulation

]]> https://www.wikitechy.com/interview-questions/cpp/which-of-the-following-concepts-means-wrapping-up-of-data-and-functions-together/feed/ 0 What are the OOPS concepts ? https://www.wikitechy.com/interview-questions/cpp/what-are-the-oops-concepts/ https://www.wikitechy.com/interview-questions/cpp/what-are-the-oops-concepts/#respond Mon, 12 Jul 2021 21:44:25 +0000 https://www.wikitechy.com/interview-questions/?p=347

What are the OOPS concepts ?

The OOPs Concepts are,

  • Objects
  • Classes
  • Abstraction
  • Encaptulation
  • Inheritance
  • Polymorphism
  • Dynamic binding
  • Messege passing

Objects

  • An object is an abstraction of a real-world entity. It may represent a person, a place, a number and icons or something else that can be modelled. Any data in an object occupy some space in memory and can communicate with each other.
C++ Class Object

Classes:

  • A class is a collection of objects having common features. It is a user defined datatype which has data members as well functions that manipulate these data’s.
Abstraction:
  • It can be defined as the separation of unnecessary details or explanation from system requirements so as to reduce the complexities of understanding requirements.

Encapsulation:

  • It is a mechanism that puts the data and function together. It is the result of hiding implementation details of an object from its user.The object hides its data to de accessed by only those functions which are packed in the class of that object.

Inheritance:

  • It is the relationship between two classes of object such that one of the classes ,the child takes all the relevant features of other class the parent. Inheritance bring about reusability.
multiple inheritance

Polymorphism:

  • Polymorphism means having many forms that in a single entity can takes more than one form. Polymorphism is implemented through operator overloading and function overloading.
polymorphism in C++

Dynamic Binding:

  • Dynamic binding is the process of resolving the function to be associated with the respective functions calls during their runtime rather than compile time.

Message Passing:

  • Every data in an object in oops that is capable of processing request known as message .
  • All object can communicate with each other by sending message to each other
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