Quiz

Question 1 (1 point)

What will the array contain after the following code is executed?

const list = ['item1', 'item2', 'item3']

list.unshift('newItem')

Question 1 options:

	['item2', 'item3']
	['item1', 'item2']
	['item1', 'item2', 'item3', 'newItem']
	['newItem', 'item1', 'item2', 'item3']

Question 2 (1 point)

How would you access 'item2' from the following array?

const list = ['item1', 'item2', 'item3', 'item4']

Question 2 options:

	list[2]
	list[1]
	list[3]
	list[4]

Question 3 (1 point)

Which of the following is an array?

Question 3 options:

	const list = {'A', 'B', 'C'}
	const list = 'A', 'B', 'C'
	const list = ['A', 'B', 'C']
	const list = ('A', 'B', 'C')

Question 4 (1 point)

What (if anything) will be displayed in the console after the following code is executed?

const list = ['item1', 'item2', 'item3']

console.log(list.join('-'))

Question 4 options:

	'item1,item2,item3'
	This code will not execute.
	'item1-item2-item3'
	'item1item2item3'

Question 5 (1 point)

What will the array contain after the following code is executed?

const list = ['item1', 'item2', 'item3', 'item4']

list.splice(1, 1)

Question 5 options:

	['item1', 'item3', 'item4']
	['item2', 'item3', 'item4']
	['item1', 'item4']
	[]

Question 6 (1 point)

What (if anything) will be displayed in the console after the following code is executed?

const list = ['item1', 'item2', 'item3']

console.log(list.join())

Question 6 options:

	'item1,item2,item3'
	'item1item2item3'
	'item1-item2-item3'
	This code will not execute.

Question 7 (1 point)

What (if anything) will be displayed in the console after the following code is executed?

const list = ['item1', 'item2', 'item3']

const newList = ['newItem']

console.log(list.concat(newList, newList))

Question 7 options:

	['item1', 'item2', 'item3', 'newItem', 'newItem']
	['item1', 'item2', 'item3']
	This code will not execute.
	['item1', 'item2', 'item3', 'newItem']

Question 8 (1 point)

What will the array contain after the following code is executed?

const list = ['item1', 'item2']

list.push('newItem')

Question 8 options:

	['newItem', 'item1', 'item2']
	['item1', 'item2', 'newItem']
	['item1', 'newItem']
	['newItem', 'item2']

Question 9 (1 point)

What will be displayed in the console after this code is executed?

const list = ['item1', 'item2', 'item3', 'item4']

console.log(list[4])

Question 9 options:

	undefined
	item4
	item5
	item3

Question 10 (1 point)

What will be displayed in the console after this code is executed?

const list = ['item1', 'item2', 'item3', 'item4']

console.log(list[2])

Question 10 options:

	item1
	item3
	item2
	item4

Question 11 (1 point)

Which of the following is an array?

Question 11 options:

	const list = [0: 10, 1: 20, 2: 30]
	const list = {10, 20, 30}
	const list = [10, 20, 30]
	const list = {0: 10, 1: 20, 2: 30}

Question 12 (1 point)

Arrays are most appropriate for storing which type of data?

Question 12 options:

	Sets of elements.
	Value/key pairs.
	A number.
	Key/value pairs.

Question 13 (1 point)

Arrays are most appropriate for storing which type of data?

Question 13 options:

	Sets of key/value pairs.
	Single numbers.
	Lists of values.
	Single values.

Question 14 (1 point)

What will the array contain after the following code is executed?

const list = ['item1', 'item2', 'item3']

list.pop()

Question 14 options:

	['item1', 'item3']
	['item1', 'item2']
	[]
	['item2', 'item3']

Question 15 (1 point)

Saved

What will the array contain after the following code is executed?

const list = ['item1', 'item2', 'item3']

list.shift()

Question 15 options:

	['item1', 'item2']
	[]
	['item2', 'item3']
	['item1']