express.js

Question 1

How do you add express to your package dependencies?

Answer 1

first npm init –yes then npm install/i express

Question 2

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

Answer 2

app.listen(PORT number, () => {

});

Question 3

How do you mount a middleware with an Express application?

Answer 3

app.use((req, res) => {

});

Question 4

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

Answer 4

req & res

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

it specifies which method to use

Question 7

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

Answer 7

you need it so that express.js can recognize the incoming Request Object as a JSON Object