Why networks enable communication in Intro to Computing - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to show how devices connect in a network.

Intro to Computing

devices = ['Computer', 'Phone', 'Printer']
network = [1](devices)
print(network)

Drag options to blanks, or click blank then click option'

Aset

Blist

Cdict

Dtuple

Attempts:

3 left

💡 Hint

Common Mistakes

Using a set which does not keep order.

Using a dict which needs key-value pairs.

The list type is used here to group devices in a network because it keeps the order and allows duplicates, just like devices connected in a network.

2fill in blank

medium

Complete the code to send a message from one device to another.

Intro to Computing

def send_message(sender, receiver, message):
    print(f"{sender} sends to {receiver}: {message}")

send_message('Phone', 'Computer', [1])

Drag options to blanks, or click blank then click option'

A'Hello!'

BHello

Cmessage

Dsend

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the message.

Using a variable name that is not defined.

The message must be a string, so it needs quotes like 'Hello!'.

3fill in blank

hard

Fix the error in the code that simulates devices communicating in a network.

Intro to Computing

network = {'Computer': 'Online', 'Phone': 'Offline'}
status = network.get([1])
print(status)

Drag options to blanks, or click blank then click option'

A'Phone'

B'Tablet'

CPhone

DTablet

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name without quotes.

Using a key not in the dictionary.

The key must be a string matching the dictionary keys, so it needs quotes like 'Phone'.

4fill in blank

hard

Fill both blanks to create a dictionary showing device statuses and check if a device is online.

Intro to Computing

devices_status = [1](Computer='Online', Phone='Offline')
if devices_status.get('Computer') == [2]:
    print('Computer is connected')

Drag options to blanks, or click blank then click option'

Adict

B'Online'

C'Offline'

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using list instead of dict.

Comparing to 'Offline' instead of 'Online'.

dict creates the dictionary. The status to check is the string 'Online'.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps devices to their status if they are online.

Intro to Computing

devices = ['Computer', 'Phone', 'Printer']
statuses = {'Computer': 'Online', 'Phone': 'Offline', 'Printer': 'Online'}
online_devices = { [1]: [2] for [3] in devices if statuses[[3]] == 'Online' }

Drag options to blanks, or click blank then click option'

Adevice

Bstatuses[device]

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name not defined in the loop.

Mixing up keys and values in the comprehension.

The comprehension uses device as the key and statuses[device] as the value. The loop variable is also device.