Express JS Express Request and Response 3

Question 1

What does req.method return in an Express handler?

Accepted Answer

The HTTP method of the request (e.g., 'GET', 'POST')

Answer

req.method returns the HTTP method string such as GET, POST, PUT, DELETE, etc.

Question 2

Which property of the response object indicates whether the response has already been sent?

Accepted Answer

res.headersSent

Answer

res.headersSent is a boolean that is true once the response headers have been sent to the client.

Question 3

How do you render a view template and send it as the HTML response in Express?

Accepted Answer

res.render('viewName', { data })

Answer

res.render() renders a view template using the configured template engine and sends the resulting HTML.

Question 4

What does req.fresh return in Express?

Accepted Answer

True if the response is considered 'not modified' based on cache headers

Answer

req.fresh checks Last-Modified and ETag headers to determine if the cached response is still valid (HTTP 304 logic).

Question 5

How do you set a cookie on the response in Express?

Accepted Answer

res.cookie('name', 'value', options)

Answer

res.cookie() sets a cookie with the specified name and value, with optional options like maxAge, httpOnly, and secure.

Express JS Practice Test