[Solved] Given the code snippet below, what will be the printed output? import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(22, GPIO.... Given the code snippet below, what will be the printed output? | Raspberry Pi

Raspberry Pi - PWM Output

Given the code snippet below, what will be the printed output? import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(22, GPIO.OUT) pwm = GPIO.PWM(22, 50) pwm.start(2.5) print('Started PWM with duty cycle:', 2.5) pwm.ChangeDutyCycle(12.5) print('Changed duty cycle to:', 12.5) pwm.stop() GPIO.cleanup()

ANo output printed

BStarted PWM with duty cycle: 2.5 Changed duty cycle to: 12.5

CError: GPIO not set up correctly

DStarted PWM with duty cycle: 12.5 Changed duty cycle to: 2.5

Step-by-Step Solution

Solution:

Step 1: Analyze print statements
The code prints the duty cycle values immediately after starting and changing PWM.
Step 2: Confirm order of prints
First print shows 2.5, second print shows 12.5 as per ChangeDutyCycle call.
Final Answer:
Started PWM with duty cycle: 2.5 Changed duty cycle to: 12.5 -> Option B
Quick Check:
Print statements match duty cycle changes [OK]

Quick Trick: Print outputs match duty cycle calls in order [OK]

Common Mistakes:

Mixing print order
Assuming runtime error
Ignoring print statements

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More Raspberry Pi Quizzes

Given the code snippet below, what will be the printed output?

Step 1: Analyze print statements

Step 2: Confirm order of prints

Final Answer:

Quick Check:

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