JS Questions.md

JS Questions

• What will this print out and why?

console.log(0.1 + 0.2);
console.log((0.1 + 0.2) === 0.3);

• Describe what the 'use strict'; expresion does

• Do you know what an object prototype is? Do you know how to declare a class in JS? Show me

• Do you know what the difference is between let, const and varare? Can you show me with an example?

• Do you know what an arrow function is in JS?

• What would you use to pull out a list of id-s of each object of this array?

const array = [
  {
    id: 1,
    foo: 'bar',
  },
  {
    id: 2,
    bar: 'foo',
  }
]

This is what I based myself off of and then I start throwing some random other questions.