Backend

Question 1

What is a promise

Answer 1

An object that may have a value later on

Question 2

A promise can have three possible states

Answer 2

1. pending - initial state, neither fulfilled nor rejected
2. fulfilled - meaning that the operation was completed successfully
3. Rejected - meaning that the operation failed

Question 3

async function getPaid(){
const houseOneWait = await houseOne()
const houseTwoWait = await houseTwo()
const houseThreeWait = await houseThree()
console.log(houseOneWait)
console.log(houseTwoWait)
console.log(houseThreeWait)
}
getPaid()

Question 4

What is an API’s fetch

Answer 4

async function getACuteDogPhoto(){
    const res = await fetch('https://dog.ceo/api/breeds/image/random')
    const data = await res.json()
    console.log(data)
}
getACuteDogPhoto()

Question 5

Javascript, does it run in the browser?

Answer 5

Yes

Question 6

JavaScript is running where in the browser

Answer 6

Sandboxed, it can’t get access to the browser in the computer

Question 7

JS is a language that can only do what the hosting environment allows

Question 8

What do servers do?

Answer 8

They serve up files

Question 9

What do servers do?

Answer 9

They serve up files

Question 10

What is Node.js

Answer 10

Node.js

The same stuff that lets you run JS in the browser can now be used to run JS on Servers, Desktops, and elsewhere

Question 11

Just
HTTP & FS

const http = require('http')
const fs = require('fs')
http.createServer((req, res) => {
  fs.readFile('demofile.html', (err, data) => {
    res.writeHead(200, {'Content-Type': 'text/html'})
    res.write(data)
    res.end()
  })
}).listen(8000)