Java interview questions for 3–4 years developers

Explore java interview questions for 3–4 years developers. Read questions shared by candidates and compare community answers before your next interview.

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Questions

Describe a practical unit, integration, contract, and end-to-end test strategy for a Java full-stack product.

BrowserStack · 3-4-years · 0 answers

Year not specified · Java, React, Testing

How would you review a pull request that changes Spring Security authentication and authorization?

BrowserStack · 3-4-years · 0 answers

Year not specified · Java, Spring Security, Authentication & Security

Design a dashboard API that aggregates millions of records without expensive queries on each request.

BrowserStack · 3-4-years · 0 answers

Year not specified · Java, SQL, Redis

How would you implement soft deletion in JPA without leaking deleted records through joins or native queries?

BrowserStack · 3-4-years · 0 answers

Year not specified · Java, JPA, Authentication & Security

Explain Java collection choices for concurrent read-and-write workloads and their performance tradeoffs.

BrowserStack · 3-4-years · 0 answers

Year not specified · Java, Software Engineering

How do you keep TypeScript frontend contracts aligned with Spring Boot request and response models?

Paytm · 3-4-years · 0 answers

Year not specified · Java, TypeScript, Spring Boot

Design a search autocomplete API that is fast, accessible, rate-limited, and safe from injection.

Paytm · 3-4-years · 0 answers

Year not specified · Java, Spring Boot, Authentication & Security

How would you choose between REST, gRPC, and Kafka for communication among Java services?

Paytm · 3-4-years · 0 answers

Year not specified · Java, Apache Kafka, Microservices

Explain CORS, CSRF, and XSS for a React and cookie-authenticated Spring Boot application.

Paytm · 3-4-years · 0 answers

Year not specified · Java, React, Spring Security