Interview Q&A / Node.js
Node.js interview questions
The event loop on the server, streams, modules and building APIs with Express.
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- What are good URL naming conventions for REST resources?
Use plural nouns for resources, let the HTTP method express the action, nest only one level for relationships, and use lowercase with hyphens. So GET /students/5/courses, not /getStudentCourses?id=5.
BeginnerQuick answer1 min read - What is the difference between PUT and PATCH in a REST API?
PUT replaces the whole resource with the body you send, so missing fields are cleared. PATCH changes only the fields you send. PUT is idempotent by definition; PATCH is not guaranteed to be.
BeginnerQuick answer1 min read - Which HTTP status codes should a REST API return for create, validation errors, missing login and forbidden access?
201 Created for a successful create, 400 for bad input (or 422 for failed validation), 401 when the user is not authenticated, 403 when authenticated but not allowed, 404 for a missing resource, and 500 for server faults.
BeginnerQuick answer1 min read