[Solved] Why is it important to use callbacks instead of polling the button state in Raspberry Pi programs? — Ans: Callbacks respond instantly without wasting CPU resources | Raspberry Pi

Raspberry Pi - gpiozero Library

Why is it important to use callbacks instead of polling the button state in Raspberry Pi programs?

ACallbacks respond instantly without wasting CPU resources

BPolling is faster and more efficient than callbacks

CCallbacks require more CPU and slow down the program

DPolling automatically debounces the button

Step-by-Step Solution

Solution:

Step 1: Compare callbacks and polling
Polling repeatedly checks button state, using CPU even when idle.
Step 2: Benefits of callbacks
Callbacks run only when button is pressed, saving CPU and responding quickly.
Final Answer:
Callbacks respond instantly without wasting CPU resources -> Option A
Quick Check:
Callbacks = efficient event-driven response [OK]

Quick Trick: Callbacks save CPU by running only on events [OK]

Common Mistakes:

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Why is it important to use callbacks instead of polling the button state in Raspberry Pi programs?