Wipro Enterprises Ltd Java Developer Interview Questions and Answers

A class is a blueprint for creating objects in Java. Java uses references instead of pointers.

• A class is a user-defined data type that encapsulates data and methods

• Java uses the 'new' keyword to create objects from a class

• References in Java point to objects in memory, but Java does not have direct access to memory addresses like pointers in C/C++

Inheritance is a mechanism in Java OOPs where a new class is derived from an existing class.

• Inheritance allows the new class to inherit the properties and methods of the existing class.

• The existing class is called the superclass or parent class, while the new class is called the subclass or child class.

• The subclass can add new properties and methods, or override the existing ones.

• The keyword 'extends' is used to create...read more

Program to reverse a string in Java

• Create a StringBuilder object with the given string

• Use the reverse() method of StringBuilder to reverse the string

• Convert the StringBuilder object back to string using toString() method