Express JS Express Routing 3

Question 1

What is the purpose of router.param() in Express?

Accepted Answer

Adds a callback triggered when a specific route parameter is present

Answer

Validates query parameters

Answer

Sets default parameter values

Answer

Defines optional route segments

Question 2

Which HTTP method does app.delete() handle in Express?

Accepted Answer

DELETE

Answer

REMOVE

Answer

DESTROY

Answer

ERASE

Question 3

How can you define multiple callback functions for a single route in Express?

Accepted Answer

Pass them as multiple arguments or an array to app.get()

Answer

Use app.chain()

Answer

Nest route definitions

Answer

Use app.multi()

Question 4

What does express.Router() return?

Accepted Answer

A mini Express application / isolated router instance

Answer

The main app object

Answer

A middleware array

Answer

An HTTP server

Question 5

In Express routing, what does the path '/' represent?

Accepted Answer

The root path of the application or mounted router

Answer

Any path

Answer

An empty path only

Answer

A relative path placeholder

Question 6

Which Express route method handles HTTP PATCH requests?

Accepted Answer

app.patch()

Answer

app.update()

Answer

app.modify()

Answer

app.change()