express Flashcards

1
Q

How do you add express to your package dependencies?

A

npm install express

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

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

A

app.listen( )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How do you mount a middleware with an Express application?

A

app.use( )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

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

A

req, res, next

mainly req and res

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

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

A

application/json

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

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

A
  • express.json returns middleware that only parses JSON and only looks at requests where the content-type header matches the ‘type’ option
  • need it when you need to parse incoming JSON requests
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

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

A
  • describes what we are trying to do (a way for us to express our intent)
  • GET, PUT, POST, DELETE, etc..
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does express.static( ) return?

A
  • returns a middleware function, you tell it from which directory to serve files from and it does that
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

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

A
  • an absolute path to the directory containing the current module
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

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

A
  • path.join( ) joins all given path segments together using the platform-specific separator as a delimiter, then normalizes the resulting path
How well did you know this?
1
Not at all
2
3
4
5
Perfectly