Q1. How does GraphQL differ from REST?
GraphQL exposes a single endpoint and a typed schema rather than many resource URLs. The client sends a query describing exactly the fields it needs, so it avoids the ove...
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Q2. How do you version a public REST API?
Common strategies: - URI path versioning: `https://api.example.com/v1/orders`. Most visible and easiest to route and cache, at the cost of polluting the URL. - Query para...
Q3. Which HTTP status codes should a REST API return?
Group them by intent and be consistent: - 2xx success: 200 OK, 201 Created (with `Location`), 202 Accepted for async work, 204 No Content after DELETE. - 3xx: 301/308 for...
Q4. How should a REST API format error responses?
Use one consistent, machine-readable shape. A widely adopted choice is RFC 7807 `application/problem+json`: ```json { "type": "https://example.com/problems/insufficient-f...