Software Developer Java Interview Questions

4,195 software developer java interview questions shared by candidates

Core Java, Multi-threading, Microservices Design Patterns, SAGA Pattern, CAP theorem, Spring Boot, JPA & Hibernate implementation, solving performance issues in Microservices and optimizing databases. Transaction Management in Microservices.
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Software Engineer - Java Developer

Interviewed at United Airlines

3.8
Jun 7, 2024

Core Java, Multi-threading, Microservices Design Patterns, SAGA Pattern, CAP theorem, Spring Boot, JPA & Hibernate implementation, solving performance issues in Microservices and optimizing databases. Transaction Management in Microservices.

1. How Java memory works 2. What we get NullPointerException 3. Program to get factorial using iteration and recursion(discussion around edge case writing code etc.) 4. Explain Volatile, Synchronized & AtomicInteger 5. Why use kafka vs SQS 6. Performance optimization

Senior Software Engineer - JAVA

Interviewed at STG Labs

4.5
Jun 8, 2026

1. How Java memory works 2. What we get NullPointerException 3. Program to get factorial using iteration and recursion(discussion around edge case writing code etc.) 4. Explain Volatile, Synchronized & AtomicInteger 5. Why use kafka vs SQS 6. Performance optimization

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