Express Flashcards

1
Q

How do you add express to your package dependencies?

A

npm install express

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2
Q

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

A

listen method

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3
Q

How do you mount a middleware with an Express application?

A

using use() method

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4
Q

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

A

res and req

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5
Q

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

A

application/json

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6
Q

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

A

the express.json perse the incoming object and attached the object to req.body
perse the incoming json string to a object and attached the object to req.body

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7
Q

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

A

HTTP defines a set of request methods to indicate the desired action to be performed for a given resource.

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8
Q

What does express.static() return?

A

middleware function

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9
Q

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

A

The directory name of the current module

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10
Q

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

A

The path.join() method joins all given path segments together using the platform-specific separator as a delimiter

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