[Solved] What will be logged to the console when the following code runs? const timer = setTimeout(() => console.log('World'), 1500); clearTimeout(timer); console.log('Finished'); | Node.js

Node.js - Timers and Scheduling

What will be logged to the console when the following code runs?

const timer = setTimeout(() => console.log('World'), 1500);
clearTimeout(timer);
console.log('Finished');

AFinished

BWorld

CFinished\nWorld

DNo output

Step-by-Step Solution

Solution:

Step 1: Analyze setTimeout and clearTimeout
The setTimeout schedules 'World' to be logged after 1.5 seconds.
Step 2: Effect of clearTimeout
The clearTimeout(timer) cancels the scheduled callback before it executes.
Step 3: Immediate console.log
console.log('Finished'); runs immediately and logs 'Finished'.
Final Answer:
Finished -> Option A
Quick Check:
Cancelled timeouts do not run [OK]

Quick Trick: clearTimeout prevents callback; immediate logs still run [OK]

Common Mistakes:

Master "Timers and Scheduling" in Node.js

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