REST constraints, resources, HTTP methods, idempotency, status codes, pagination, versioning, HATEOAS and OpenAPI.
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- What are the six constraints of REST architecture?
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Client-Server, Statelessness, Uniform Interface, Cacheability, Layered System, Code on Demand- Explain the Client-Server constraint of REST.
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Separates clients and servers so each can evolve independently without tight coupling- What does the Statelessness constraint require?
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Each request must contain all information needed to process it; the server stores no client context- Explain the Uniform Interface constraint in REST.
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Standardized communication through consistent resource identification, manipulation via HTTP methods, and self-descriptive messages- What is the purpose of the Cacheability constraint?
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Responses must define themselves as cacheable or not-cacheable to improve performance and reduce server load- Explain the Layered System constraint.
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Clients cannot tell if directly connected to the end server; systems organized in layers interact only with adjacent layers- What is the Code on Demand constraint?
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Servers can optionally extend client functionality by transferring executable code (rarely used in modern APIs)- What is a resource in REST API design?
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An entity or object identified by a unique URI that can be accessed and manipulated using HTTP methods- How should resource URIs be structured in REST APIs?
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Use nouns instead of verbs, lowercase letters, hyphens to separate words, and hierarchical paths for relationships- Should you use verbs or nouns in REST resource URLs?
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Nouns; HTTP methods provide the verbs so URLs should identify the resource being acted upon- How should you represent a one-to-many relationship in a REST URL?
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Use hierarchical paths like /users/123/posts to show posts belonging to user 123- What naming convention should REST resource URLs follow?
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Use plural nouns in lowercase with hyphens: /api/users, /api/blog-posts (not /user or /BlogPosts)- What HTTP method retrieves a resource without modifying it?
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GET- What HTTP method creates a new resource?
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POST- What HTTP method replaces an entire existing resource?
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PUT
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