Response methods and status codes in Node.js - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the res.status(code) method do in Node.js?

It sets the HTTP status code of the response that the server sends back to the client. For example, res.status(404) sets the status to 'Not Found'.

beginner

Name a common HTTP status code for a successful GET request.

The status code 200 means 'OK', which indicates the request was successful and the server is sending the requested data.

beginner

What is the purpose of res.send() in Node.js?

It sends the response body to the client and ends the response process. You can send strings, objects, or buffers with it.

intermediate

How do you send a JSON response with a status code of 201 in Node.js?

Use res.status(201).json(data). This sets the status to 'Created' and sends the JSON data to the client.

beginner

What status code indicates that the client made a bad request?

Status code 400 means 'Bad Request'. It tells the client that the server could not understand the request due to invalid syntax.

Which method sets the HTTP status code in a Node.js response?

A res.json()

B res.status()

C res.send()

D res.write()

res.status() sets the HTTP status code before sending the response.

What status code means 'Not Found'?

A 404

B 200

C 500

D 301

Status code 404 means the requested resource was not found.

How do you send a JSON response in Node.js?

A res.json()

B res.writeJson()

C res.send()

D res.sendJson()

res.json() sends a JSON response to the client.

Which status code indicates a successful resource creation?

A 500

B 400

C 403

D 201

Status code 201 means 'Created', used when a resource is successfully created.

What does res.send() do?

A Only sends JSON data

B Sets the status code

C Sends the response body and ends the response

D Only sends headers

res.send() sends the response body and ends the response process.

Explain how to send a response with a custom status code and JSON data in Node.js.

Think about chaining methods to set status and send JSON.

List three common HTTP status codes and what they mean when used in a Node.js response.

Focus on success, client error, and resource not found.