[Solved] In an emergency system, this code snippet causes a problem:if sensor.detect(): alert.send() safety.activate()log.record()What is the main issue? | LLD

LLD - Design — Elevator System

In an emergency system, this code snippet causes a problem:

if sensor.detect():
 alert.send()
 safety.activate()
log.record()

What is the main issue?

AMissing indentation causes log.record() to run always

Bsafety.activate() is outside the if block

Calert.send() is not called properly

Dlog.record() runs even if no detection

Step-by-Step Solution

Solution:

Step 1: Check code indentation
log.record() is not indented under the if, so it runs always.
Step 2: Understand impact
log.record() runs even when sensor.detect() is false, which is incorrect behavior.
Final Answer:
Missing indentation causes log.record() to run always -> Option A
Quick Check:
Indentation controls conditional execution [OK]

Quick Trick: Indent all emergency actions inside detection check [OK]

Common Mistakes:

MISTAKES

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