Creating a basic HTTP server in Node.js - Quick Revision & Summary

Recall & Review

beginner

What Node.js module is used to create a basic HTTP server?

The http module is used to create a basic HTTP server in Node.js.

beginner

What method starts the server and listens for requests?

The server.listen(port, callback) method starts the server and listens on the specified port.

beginner

In the callback for http.createServer(), what are the two main objects provided?

The callback receives request and response objects. request contains info about the incoming request, and response is used to send data back to the client.

beginner

How do you send a plain text response 'Hello World' to the client?

Use response.writeHead(200, {'Content-Type': 'text/plain'}) to set status and headers, then response.end('Hello World') to send the response and close the connection.

beginner

Why is it important to call response.end() in a Node.js HTTP server?

Calling response.end() signals that the response is complete. Without it, the client will keep waiting and the connection stays open.

Which Node.js module do you import to create an HTTP server?

A http

B fs

C path

D url

The http module provides the tools to create an HTTP server.

What method do you use to start listening for incoming requests?

A server.start()

B http.createServer()

C server.listen()

D http.listen()

The listen() method starts the server and listens on a specified port.

In the server callback, which object contains information about the client's request?

A server

B request

C response

D client

The request object holds details about the incoming client request.

How do you send a response header with status 200 and content type 'text/plain'?

A response.writeHead(200, {'Content-Type': 'text/plain'})

B response.write('200', 'text/plain')

C response.setHeader(200, 'text/plain')

D response.sendHeader(200, 'text/plain')

Use writeHead to set status and headers before sending the response body.

What happens if you forget to call response.end()?

A The server crashes

B The server restarts

C The response is sent automatically

D The client keeps waiting and connection stays open

Without response.end(), the server does not finish the response, so the client waits indefinitely.

Explain how to create a basic HTTP server in Node.js that responds with 'Hello World'.

Think about the steps from importing to sending a response and listening on a port.

Describe the roles of the request and response objects in a Node.js HTTP server.

Consider what each object lets you do during a client-server interaction.