Express JS Express Middleware 3

Question 1

Which middleware package is commonly used to parse cookie headers in Express?

Accepted Answer

cookie-parser

Answer

express-cookies

Answer

cookie-middleware

Answer

req-cookies

Question 2

What is the purpose of the helmet package in an Express application?

Accepted Answer

Sets security-related HTTP response headers

Answer

Enforces HTTPS redirects

Answer

Rate-limits incoming requests

Answer

Validates request bodies

Question 3

Where should error-handling middleware be placed in an Express application?

Accepted Answer

After all other app.use() and route definitions

Answer

Before all routes

Answer

At any position

Answer

Inside route handlers only

Question 4

Which middleware is used to compress HTTP responses in Express?

Accepted Answer

compression

Answer

express-zip

Answer

gzip-middleware

Answer

deflate

Question 5

What does next('router') do when called inside a Router middleware?

Accepted Answer

Skips the rest of the router's middleware and returns control to the parent app

Answer

Moves to the next router

Answer

Throws a router error

Answer

Ends the request cycle

Question 6

What built-in Express middleware serves a directory listing or static files from a path?

Accepted Answer

express.static()

Answer

express.serve()

Answer

express.files()

Answer

express.directory()