Express JS Express Routing 2

Question 1

Which Express method defines a route that handles HTTP GET requests?

Accepted Answer

app.get()

Answer

app.get() registers a handler for HTTP GET requests at the specified path.

Question 2

What is route chaining in Express?

Accepted Answer

Using app.route() to chain multiple HTTP method handlers for one path

Answer

app.route() returns a route instance that allows chaining handlers for GET, POST, PUT, etc. on the same path.

Question 3

In Express, what regular expression pattern matches routes like /ab?cd?

Accepted Answer

The 'b' and 'd' characters are optional

Answer

In Express route patterns, '?' makes the preceding character optional, so /ab?cd matches /acd and /abcd.

Question 4

What happens when you pass a string pattern '/ab*cd' as an Express route path?

Accepted Answer

It matches /abcd, /abXcd, /ab123cd, etc.

Answer

The '*' wildcard in an Express route pattern matches any sequence of characters.

Question 5

Which property of the request object contains the query string parameters parsed as an object?

Accepted Answer

req.query

Answer

req.query contains the parsed query string as a key-value object.

Express JS Practice Test