[Solved] What will be the output order of this Node.js code?console.log('A'); setTimeout(() => console.log('B'), 0); process.nextTick(() => console.log('C')); console.log('D'); | Node.js

Node.js - Timers and Scheduling

What will be the output order of this Node.js code?

console.log('A');
setTimeout(() => console.log('B'), 0);
process.nextTick(() => console.log('C'));
console.log('D');

AA C D B

BA C B D

CA D B C

DA D C B

Step-by-Step Solution

Solution:

Step 1: Identify synchronous logs
'A' and 'D' log immediately in order.
Step 2: Understand process.nextTick and setTimeout order
process.nextTick runs before timers, so 'C' logs before 'B'.
Final Answer:
A C D B -> Option A
Quick Check:
Output order = A C D B [OK]

Quick Trick: process.nextTick runs before setTimeout even with zero delay [OK]

Common Mistakes:

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