kinshuk4 / java-interview

Study notes for Java developer interview

Java interview

I created study notes for my recent interviews. I am sharing them here so that others can benefit from it. The notes are specifically for theory based Java interviews, typically done in service based companies (as opposed to coding based interviews done in product companies).

How to use it?

These are study notes, mostly for revision couple of days before the interview. Check resources on each topic for more in-depth preparation.

Table Of Contents

Core Java

• Core Java
• Collections
• Java 8
• Java Memory Model
• Concurrency
• Garbage Collection
• JVM Internals

Design / Clean Code

• SOLID Principles
• Effective Java
• Design Patterns
• Approach to Design Questions

Related topics

• SQL
• UNIX
• Web

Other topics

• Spring Boot overview (DI, Security, JPA, Testing)

Opinion based questions

Answers to such questions vary based on multiple factors (interviewer and interviewee's experience with Java, exposure to other languages, personal taste, etc). Thus, take the answers with pinch of salt, and make them your own before using them.

• What do you like about Java? Answer
• What do you not like about Java? Answer
• Which is better - compilation, interpretation or JIT? Why? Answer