INTERVIEW PREP KIT

Java Backend Engineer Interview Prep

Fundamentals to advanced. Real scenarios, structured answers and the follow-up traps interviewers use — because interviews test decisions and trade-offs, not syntax.

Start with Core Java 15-day System Design plan Download PDFs

2576 questions available so far. Content is added chapter by chapter.

Core Java

Fundamentals to advanced: theory, scenarios and follow-up traps.

Spring & Hibernate

Real-world Spring Boot, JPA/Hibernate and Security scenarios.

Database & Caching

SQL, isolation levels, Redis, migrations, Elasticsearch.

System Design

Concepts, LLD, HLD and a 15-day plan.

Docker, Cloud & DevOps

Docker, AWS, Kubernetes, CI/CD, observability.