Node.js Express.js & REST APIs 4

Question 1

Which Express built-in middleware parses URL-encoded form bodies?

Accepted Answer

express.urlencoded()

Answer

express.urlencoded() parses bodies with Content-Type application/x-www-form-urlencoded.

Question 2

In REST API design, which HTTP method should be used for a partial update of a resource?

Accepted Answer

PATCH

Answer

PATCH is designed for partial modifications, while PUT replaces the entire resource.

Question 3

What is the role of the morgan middleware in an Express application?

Accepted Answer

HTTP request logging

Answer

Morgan is an HTTP request logger middleware that records request details to the console or a stream.

Question 4

How do you define a catch-all 404 handler in Express that runs after all other routes?

Accepted Answer

app.use(fn) placed after all route definitions

Answer

Middleware registered with app.use() after all routes runs only when no route matched the request.

Question 5

Which approach correctly protects an Express route so only authenticated users can access it?

Accepted Answer

Placing an auth middleware before the route handler

Answer

Chaining an authentication middleware before the handler enforces auth before any business logic runs.

Node.js Practice Test