JAVA : Explain Inheritance in Java. SDET Automation Testing Interview Questions & Answers

Level up your SDET and QA skills! 🚀 JAVA : Explain Inheritance in Java.

SDET Automation Testing Interview Questions & Answers

We will be covering a wide range of topics including QA manual testing, automation testing, Selenium, Java, Jenkins, Cucumber, Maven, and various testing frameworks.

Explain Inheritance in Java.

Inheritance is one of the fundamental concepts in object-oriented programming (OOP) languages like Java.

It allows a class to inherit properties and behavior from another class.

The class that is inherited from is called the superclass or parent class, and the class that inherits from the superclass is called the subclass or child class.

In Java, inheritance is achieved using the extends keyword.

When a subclass extends a superclass, it can access all the public and protected fields and methods of the superclass.

This means that the subclass can reuse the code written in the superclass, and add its own fields and methods to provide additional functionality.

For example, consider a class hierarchy where we have a superclass called Vehicle and two subclasses called Car and Motorcycle.

The Car and Motorcycle classes can inherit the properties and behavior of the Vehicle class, such as the start() and stop() methods. However, they can also add their own unique properties, such as the number of wheels in the case of Car and Motorcycle.

Inheritance promotes code reuse, improves maintainability, and enables polymorphism, which allows objects of different classes to be treated as if they are of the same type.

However, it should be used carefully, as it can also lead to tight coupling between classes and can make the code harder to understand and debug.

[sdet_automation_testing]

Explain Inheritance in Java.

Inheritance is one of the fundamental concepts in object-oriented programming (OOP) languages like Java.

It allows a class to inherit properties and behavior from another class.

The class that is inherited from is called the superclass or parent class, and the class that inherits from the superclass is called the subclass or child class.

In Java, inheritance is achieved using the extends keyword.

When a subclass extends a superclass, it can access all the public and protected fields and methods of the superclass.

This means that the subclass can reuse the code written in the superclass, and add its own fields and methods to provide additional functionality.

For example, consider a class hierarchy where we have a superclass called Vehicle and two subclasses called Car and Motorcycle.

The Car and Motorcycle classes can inherit the properties and behavior of the Vehicle class, such as the start() and stop() methods. However, they can also add their own unique properties, such as the number of wheels in the case of Car and Motorcycle.

Inheritance promotes code reuse, improves maintainability, and enables polymorphism, which allows objects of different classes to be treated as if they are of the same type.

However, it should be used carefully, as it can also lead to tight coupling between classes and can make the code harder to understand and debug.