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. What is idempotency and which HTTP methods are idempotent?
An operation is idempotent when performing it multiple times produces the same server state as performing it once. - GET, HEAD, PUT and DELETE are idempotent by HTTP sema...
Q3. What does HATEOAS mean in REST?
HATEOAS stands for Hypermedia as the Engine of Application State. A response not only carries data but also links describing the actions and related resources the client ...
Q4. When is REST the wrong choice, and what would you use instead?
REST excels at resource-oriented CRUD with cacheable, uniform interfaces and a broad tool ecosystem. It becomes awkward when: - The domain is action-oriented or RPC-like,...