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
Java interview questions and answers
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Questions
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
How would you debug a production race condition in a concurrent Java order-processing workflow?
Paytm · 3-4-years · 0 answers
Year not specified · Java, Software Engineering
Design a zero-downtime deployment for Spring Boot services with backward-compatible database changes.
Zomato · 3-4-years · 0 answers
Year not specified · Java, DevOps, Spring Boot
How would you model hierarchical categories efficiently with SQL, JPA, and Hibernate?
Zomato · 3-4-years · 0 answers
Year not specified · Java, JPA, SQL
Explain hexagonal architecture in Java and when extra ports and adapters add more complexity than value.
Zomato · 3-4-years · 0 answers
Year not specified · Java, Software Engineering, System Design
How do you protect a Java service from slow dependencies using timeouts, retries, bulkheads, and circuit breakers?
Zomato · 3-4-years · 0 answers
Year not specified · Java, Microservices, Software Engineering
Compare server-side and client-side filtering for a React table backed by Spring Boot.
Zomato · 3-4-years · 0 answers
Year not specified · Java, React, SQL
How would you implement real-time notifications with WebSockets while handling reconnects and authorization?
Swiggy · 3-4-years · 0 answers
Year not specified · Java, Spring Boot, React
Design an append-only audit trail for sensitive changes in a Java product application.
Swiggy · 3-4-years · 0 answers
Year not specified · Java, Authentication & Security, System Design
How would you protect and rotate secrets for a Spring Boot application running on AWS?
Swiggy · 3-4-years · 0 answers
Year not specified · Java, AWS, Authentication & Security
Explain propagation and rollback behavior in Spring transactions, including common proxy-related mistakes.
Swiggy · 3-4-years · 0 answers
Year not specified · Java, Spring Boot, SQL
How do you validate nested request objects in React and Spring Boot without trusting client-side checks?
Swiggy · 3-4-years · 0 answers
Year not specified · Java, React, Spring Boot