Enabling serial on Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable the serial interface by editing the configuration file.

Raspberry Pi

sudo raspi-config nonint do_serial [1]

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

A1

Benable

C0

Ddisable

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 disables the serial interface instead of enabling it.

Typing 'enable' or 'disable' instead of 1 or 0 causes the command to fail.

Using 1 enables the serial interface on Raspberry Pi via raspi-config.

2fill in blank

medium

Complete the command to edit the boot configuration file to enable UART.

Raspberry Pi

sudo nano /boot/config.txt
Add the line: enable_uart=[1]

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

Afalse

Btrue

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 disables UART instead of enabling it.

Using 'true' or 'false' is not recognized in this config file.

Setting enable_uart=1 in /boot/config.txt enables the UART serial port.

3fill in blank

hard

Fix the error in the command to disable the serial console on Raspberry Pi.

Raspberry Pi

sudo systemctl [1] [e-mail]

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

Astop

Bstart

Cenable

Drestart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' or 'enable' keeps the serial console active.

Restarting the service does not disable it.

To disable the serial console, you stop the [e-mail] service.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps device names to their baud rates, only for devices with baud rate greater than 9600.

Raspberry Pi

baud_rates = {device: rate for device, rate in devices.items() if rate [1] [2]

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

A>

B9600

C<

D115200

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than operator filters the wrong devices.

Using 115200 as threshold filters too many devices.

The comprehension filters devices with baud rates greater than 9600 using rate > 9600.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that converts device names to uppercase, keeps their baud rates, and filters only devices with baud rate less than 115200.

Raspberry Pi

filtered = { [1]: [2] for [3], rate in devices.items() if rate < 115200 }

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

Adevice.upper()

Brate

Cdevice

Ddevices

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'devices' instead of 'device' in the loop variable.

Not converting device names to uppercase.

The comprehension converts device names to uppercase, keeps the rate, and filters by rate less than 115200.