Java Interview Questions

Interviews for IT jobs including Java jobs often include challenges far beyond the usual questions regarding career aspirations.

IT interviews often consist of brainteasers, riddles and practical questions designed to measure your logic, reasoning, creative thinking, and problem-solving skills. The objective for the interviewer is not only to assess your technical knowledge, but also your communication skills and suitability (culturally) for the company.

Here are some example Java job interview questions to help you to prepare yourself (answers can be found at the bottom of the page):

Java interview questions

1. What is a transient variable?
2. What is the difference between Abstract class and Interface?
3. What is the difference between string and string buffer?
4. Is null a keyword?
5. What is the difference between multi-threading and multi-processing?
6. What is the difference between equals() method and ==?
7. What is JVM?
8. What are class variables and instance variables?
9. What is synchronization and why is it important?
10. How can you force garbage collection?
11. What’s the difference between constructors and other methods?
12. Explain the usage of Java packages

Click here to view answers.

It is important at Java job interviews to be specific when answering questions. Concise qualitative answers demonstrate confidence and knowledge.

For more advice on perfecting your interview technique, we've partnered up with CV Knowhow who offer interview coaching so click here to find out more.

Good Luck!