res.set for response headers in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the Content-Type header to 'application/json'.

Express

res.[1]('Content-Type', 'application/json');

Drag options to blanks, or click blank then click option'

Asend

Bset

Cget

Dwrite

Attempts:

3 left

💡 Hint

Common Mistakes

Using res.send instead of res.set, which sends the response body instead of setting headers.

Using res.get, which retrieves headers but does not set them.

The res.set method sets HTTP headers on the response. Here, it sets the 'Content-Type' header.

2fill in blank

medium

Complete the code to set multiple headers at once using an object.

Express

res.[1]({ 'Cache-Control': 'no-cache', 'X-Powered-By': 'Express' });

Drag options to blanks, or click blank then click option'

Asend

BwriteHead

Cheader

Dset

Attempts:

3 left

💡 Hint

Common Mistakes

Using res.send which sends the response body, not headers.

Using res.writeHead which is a Node.js method but not typical in Express.

The res.set method can accept an object to set multiple headers at once.

3fill in blank

hard

Fix the error in setting a header by completing the method name correctly.

Express

res.[1]('Authorization', 'Bearer token123');

Drag options to blanks, or click blank then click option'

Aset

BsetHeader

Cheader

Dwrite

Attempts:

3 left

💡 Hint

Common Mistakes

Using res.setHeader which is not the Express method.

Using res.write which is for writing response body.

In Express, the correct method to set headers is res.set. setHeader is a Node.js method but not used directly on Express response objects.

4fill in blank

hard

Fill both blanks to set the 'Content-Language' header to 'en-US'.

Express

res.[1]('[2]', 'en-US');

Drag options to blanks, or click blank then click option'

Aset

Bsend

CContent-Language

DContent-Type

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Content-Type' instead of 'Content-Language'.

Using res.send instead of res.set.

The res.set method sets headers. The header name here is 'Content-Language'.

5fill in blank

hard

Fill all three blanks to set headers 'X-Frame-Options' to 'DENY', 'Strict-Transport-Security' to 'max-age=31536000', and 'Referrer-Policy' to 'no-referrer'.

Express

res.[1]({ [2]: 'DENY', [3]: 'max-age=31536000', 'Referrer-Policy': 'no-referrer' });

Drag options to blanks, or click blank then click option'

Aset

BX-Frame-Options

CStrict-Transport-Security

DContent-Security-Policy

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong method names like res.send or res.write.

Using incorrect header names or misspelling them.

Use res.set to set multiple headers at once. The keys are the header names exactly as required.