Question 1

What is the difference between REST and GraphQL?

Accepted Answer

REST is an architectural style that uses a fixed set of endpoints to expose resources, often leading to over-fetching or under-fetching of data. GraphQL is a query language for APIs that allows clients to request exactly the data they need, which can be more efficient.

Question 2

What is idempotency and why is it important in API design?

Accepted Answer

Idempotency means that making the same API request multiple times has the same effect as making it once. This is important for reliability, as it prevents accidental duplication of actions if a client retries a request due to a network error.

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