Raspberry Pi - LED and Button Projects
You want to create a reaction time game that lights an LED randomly between 2 to 5 seconds after starting. Which Python code snippet correctly implements this delay?
You want to create a reaction time game that lights an LED randomly between 2 to 5 seconds after starting. Which Python code snippet correctly implements this delay?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand random delay requirements
The delay must be any float between 2 and 5 seconds.Step 2: Analyze each option
import random import time time.sleep(random.uniform(2, 5)) uses random.uniform(2,5) which returns a float in range 2 to 5, perfect for delay. import random import time time.sleep(random.randint(2, 5)) uses randint which returns integers only. import random import time time.sleep(random.random() * 5) produces a float between 0 and 5 seconds, incorrect range. import random import time time.sleep(random.choice([2, 3, 4, 5])) picks fixed integers only.Final Answer:
import random import time time.sleep(random.uniform(2, 5)) -> Option BQuick Check:
Use random.uniform for float range delays [OK]
Quick Trick: Use random.uniform(min, max) for float delays [OK]
Common Mistakes:
- Using randint for float delays
- Using random.random() without scaling properly
- Choosing fixed values instead of range
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