javascript-mid

What will be console logged into the terminal?

• 1

• 2

• {number: 1}

• 3

What property tells you how many items are in an array?

• count

• sum

• length

• items

What will this code log?

• 3

• undefined

• 1,2,3,4

• arr

Which of the following code will return `undefined` using the following array?

const numbers = [3, 1];

• numbers[0]

• numbers[2-1]

• numbers[3]

• numbers[numbers.length -1]

What is the output of the following code?

• Undefined

• function

• number

• ReferenceError: Barr is not defined

Given a number of elements that need to stay in order, would you use an Object or an Array?

• Array

• Object

All the elements in an array must be of the same type?

• True

• False

• Yes

What happens to the array in the following code snippet?

• Nothing

• The array becomes just ["Pizza"]

• The array becomes just ["Hamburger"]

• The array becomes just ["Pizza",Hamburger"]

How would you change the first element in an array?

• nums[1] = "New!";

• nums = "New!";

• var nums[1] = "New!";

• nums[0] = "New!";

What is the output of this code?

• 1

  3

  2

  2

• 1

  3

  4

  2

• 1

  4

  3

  2

• 1

  2

  3

  4