What is super keyword ? What is inheritance ? What is abstract and why it is used? And many more questions was asked......?

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Answers to common Java interview questions on super keyword, inheritance, and abstract classes.

The super keyword is used to call a method or constructor in the parent class.
Inheritance is a mechanism in which one class acquires the properties and methods of another class.
Abstract classes are classes that cannot be instantiated and are used as a base for other classes to inherit from.
Abstract methods are methods that do not have a body and must be implemented by the subclass.
Polymorphism is the ability of an object to take on many forms.
Encapsulation is the practice of hiding the internal details of an object and only exposing a public interface.
Interfaces are a way to achieve multiple inheritance in Java.
Exception handling is the process of handling errors and exceptions in a program.
Java Virtual Machine (JVM) is an abstract machine that provides a runtime environment for Java programs.
Garbage collection is the process of automatically freeing memory that is no longer being used by a program.

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