Education platform for interview prep, online tests, tutorials, and live practice

Build skills with focused learning paths, mock tests, and interview-ready content.

WithoutBook brings subject-wise interview questions, online practice tests, tutorials, and comparison guides into one responsive learning workspace.

Search the library

Prepare Interview

Java OOPs Interview Questions and Answers

Question: What is a singleton class in Java?

Answer: A singleton class in Java is a class that allows only one instance to be created. It provides a global point of access to that instance.

Example:

class Singleton { private static Singleton instance = new Singleton(); 
private Singleton() {} 
public static Singleton getInstance() { return instance; } }

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library

Is it helpful? Yes No

Most helpful rated by users:

Explain the concept of method hiding in Java.