Practice RESTful design, HTTP methods, status codes, and API best practices
Start Practicing NowUnderstand REST constraints, resource modeling, and HTTP methods
Learn versioning, pagination, filtering, and response formats
Master authentication, rate limiting, and API security
Select REST APIs as your interview topic and customize the difficulty level
Answer realistic REST APIs interview questions in a simulated environment
Receive detailed feedback on your answers, including areas to improve
Monitor your improvement and identify strengths and weaknesses
HTTP methods (GET, POST, PUT, DELETE, PATCH)
Status codes and error handling
RESTful resource design patterns
Authentication (JWT, OAuth)
Versioning and pagination
HATEOAS and hypermedia
A: REST constraints: stateless (no client context stored), client-server separation, cacheable responses, uniform interface (HTTP methods, URIs), layered system, code-on-demand (optional). Resources identified by URIs. Use HTTP methods correctly: GET (read), POST (create), PUT (replace), PATCH (update), DELETE (remove).
A: Methods: URL versioning (/v1/users), header versioning (Accept: application/vnd.api+json; version=1), query parameter (?version=1). URL versioning most common and explicit. Maintain backward compatibility when possible. Deprecate old versions with clear timeline. Document breaking changes.
A: Idempotent operations produce same result when repeated. GET, PUT, DELETE are idempotent. POST is not. PUT replaces entire resource (same result if repeated). PATCH may not be idempotent depending on implementation. Important for retry logic and reliability. Use idempotency keys for POST when needed.
A: Offset-based: ?page=2&limit=20 or ?offset=20&limit=20. Cursor-based: ?cursor=abc123&limit=20 (better for real-time data, prevents duplicates/missing items). Return pagination metadata: total, next, previous links. Use Link headers (RFC 5988). Cursor-based scales better for large datasets.
Use proper HTTP status codes: 200 OK, 201 Created, 400 Bad Request, 404 Not Found, 500 Internal Error
Implement proper error responses with consistent structure
Know REST vs GraphQL trade-offs and when to use each
Understand HATEOAS (Hypermedia as Engine of Application State)
Practice with API security: JWT, OAuth 2.0, rate limiting
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