Question

You want to write a Python program on Raspberry Pi that turns an LED on for 1 second, off for 1 second, and repeats this 5 times. Which code snippet correctly implements this behavior?

Accepted Answer

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(21, GPIO.OUT)
for i in range(5):
    GPIO.output(21, GPIO.HIGH)
    time.sleep(1)
    GPIO.output(21, GPIO.LOW)
    time.sleep(1)
GPIO.cleanup()

Answer

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(21, GPIO.OUT)
GPIO.output(21, GPIO.HIGH)
time.sleep(5)
GPIO.output(21, GPIO.LOW)
GPIO.cleanup()

Answer

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(21, GPIO.OUT)
for i in range(5):
    GPIO.output(21, GPIO.LOW)
    time.sleep(1)
    GPIO.output(21, GPIO.HIGH)
    time.sleep(1)
GPIO.cleanup()

Answer

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(21, GPIO.OUT)
GPIO.output(21, GPIO.HIGH)
time.sleep(1)
GPIO.output(21, GPIO.LOW)
time.sleep(1)

You want to write a Python program on Raspberry Pi that turns an LED on for 1 second, off for 1 second, and repeats this 5 times. Which code snippet correctly implements this behavior?

Step 1: Understand the loop for repetition

Step 2: Correct on/off timing inside loop

Final Answer:

Quick Check:

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