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API Testing Q&A
API Testing Interview Questions
Everything you need to crack REST API testing rounds — status codes, methods, auth, Postman, REST Assured, contract testing and pagination.
- HTTP methods, status codes & headers
- Postman collections, environments, Newman
- REST Assured with Java & TestNG
- Auth: Basic, Bearer, OAuth 2.0, JWT
- Schema validation & contract testing
- Pagination, rate limiting & retries
Real-world scenarios
We cover the scenario-based questions interviewers love: how to test an idempotent POST, how to validate eventual consistency, how to mock third-party APIs and how to chain requests.
Frequently asked questions
Which tools are covered?
Postman, REST Assured, Karate, Newman, and basic gRPC testing.
Do you cover authentication?
Yes — Basic, Bearer, OAuth 2.0, API keys and JWT handling.