Knowledge check - Learn | Microsoft Docs

1.

What steps do you need to construct a web application with Express?

Instantiate an app, Configure routes, Set up middleware, Set up error handlers, Listen to the server

Instantiate an app, Listen to the server

Instantiate an app, Configure routes, Listen to the server

Instantiate an app, Configure routes, Set up middleware, Listen to the server

2.

What's the preferred way to send a JSON response from an Express app?

Call the json() helper method on the response object, res.json({ content: '' })

Call res.send({ content: '' })

Call res.send(JSON.stringify({ content: '' }))

Use any of these ways: res.type('json'), res.type('application/json'), res.contentType('application/json'), res.format({ 'application/json': function() { res.send({}) } })

3.

How would you set up Express to handle a post request with JSON data?

Register a route by using the post method as in app.post(<route>, () =>{}), Read from the req.body object

Configure body parsing middleware, Register a route by using the post method as in app.post(<route>, () =>{}), Read from the req.data object

Call app.use(bodyParser.json()) at the top, Register a route by using the post method as in app.post(<route>, () =>{}), Read from the req.body object

Call app.use(bodyParser.urlencoded({ extended: false })) at the top, Register a route by using the post method as in app.post(<route>, () =>{}), Read from the req.body object