express

Question 1

How do you add express to your package dependencies?

Answer 1

npm install express
automatically updates list of dependencies

Question 2

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

Answer 2

.listen

Question 3

How do you mount a middleware with an Express application?

Answer 3

.use( )

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

to specify intent of the function,
a label to state what it does

Question 7

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

Answer 7

returns a middleware that parses json,
you need it for client requests with a json

Question 8

What does express.static() return?

Answer 8

returns a function
the static files requested

Question 9

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

Answer 9

the path to the current file

Question 10

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

Answer 10

combines all the string path arguments together and returns a file path