GET route handling in Express - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a GET route in Express?

A GET route in Express is a way to handle HTTP GET requests from clients. It defines what the server should do when a user visits a specific URL.

beginner

How do you define a GET route for the path '/home' in Express?

You use app.get('/home', (req, res) => { res.send('Hello Home'); }); to define a GET route that sends 'Hello Home' when '/home' is visited.

beginner

What do the req and res objects represent in a GET route handler?

req is the request object containing information from the client, like query data. res is the response object used to send data back to the client.

intermediate

How can you send JSON data in response to a GET request in Express?

Use res.json({ key: 'value' }) inside the GET route handler to send JSON data back to the client.

beginner

Why is it important to handle GET routes properly in a web server?

Proper GET route handling ensures users get the right content when they visit URLs. It helps the server respond quickly and correctly, improving user experience.

Which method defines a GET route in Express?

A app.get()

B app.post()

C app.put()

D app.delete()

The app.get() method is used to define a GET route in Express.

In Express, what does the res.send() method do inside a GET route?

A Sends a response back to the client

B Receives data from the client

C Starts the server

D Defines a new route

res.send() sends a response back to the client.

What object holds information about the client's request in a GET route handler?

A res

B server

C app

D req

The req object contains information about the client's request.

How do you send JSON data in response to a GET request?

A res.sendFile()

B res.json()

C res.redirect()

D res.render()

Use res.json() to send JSON data in response.

Which URL path will this route handle? app.get('/about', ...)

A /

B /home

C /about

D /contact

The route handles GET requests to the '/about' path.

Explain how to create a simple GET route in Express that returns a welcome message.

Think about how you tell the server what to do when someone visits a URL.

Describe the roles of the req and res objects in a GET route handler.

One listens to the client, the other talks back.