express intro, get-json, delete, post-json

Question 1

How do you add express to your package dependencies?

Answer 1

Using the command:

npm install express

Question 2

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

Answer 2

app.listen()

Binds and listens for connections on the specified host and port. Identical to Node’s http.Server.listen()

Question 3

How do you mount middleware with an Express application?

Answer 3

The use method of the app function

Question 4

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

Answer 4

Request and Response object

Question 5

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

Answer 5

application/json

Question 6

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

Answer 6

It is a protocol which allows the fetching of resources

It allows us to get and use data

Question 7

What does the express.json() middleware do and when would you need it?

Answer 7

It parses incoming requests with JSON payloads and is based on the body-parser

It’s used whenever the content type header matches the server