Express

Question 1

How do you add express to your package dependencies?

Answer 1

Npm install express

Question 2

What Express application method starts the server and binds it to a network PORT?

Answer 2

app.listen(path, [callback])

Question 3

How do you mount a middleware with an Express application?

Answer 3

By app.use()

Question 4

Which objects does an Express application pass to your middleware to manage the request/response lifecycle of the server?

Answer 4

Request object, response object

Question 5

What is the appropriate Content-Type header for HTTP messages that contain JSON in their bodies?

Answer 5

application/json

Question 6

What is the significance of an HTTP request’s method?

Answer 6

Is arbitrary. It makes it more specific for the

it allows to show the server what the client wants to do.

Question 7

What does express.static() return?

Answer 7

The root argument specifies the root directory from which to serve static assets. The function determines the file to serve by combining req.url with the provided root directory. When a file is not found, instead of sending a 404 response,

Question 8

What is the local __dirname variable in a Node.js module?

Answer 8

variable that tells you the absolute path of the directory containing the currently executing file

Question 9

What does the join() method of Node’s path module do?

Answer 9

joins the specified path segments into one path. You can specify as many path segments as you like. The specified path segments must be strings, separated by comma.