[Solved] Given the code below, what will be the output? const sab = new SharedArrayBuffer(4); const int32 = new Int32Array(sab); int32[0] = 10; Atomics.add(int32, 0, 5); console.log(int32[0]); | Node.js

Node.js - Worker Threads

Given the code below, what will be the output?

const sab = new SharedArrayBuffer(4);
const int32 = new Int32Array(sab);
int32[0] = 10;
Atomics.add(int32, 0, 5);
console.log(int32[0]);

A10

B5

C15

DNaN

Step-by-Step Solution

Solution:

Step 1: Understand initial value and Atomics.add
The int32[0] is set to 10. Then Atomics.add adds 5 to this value atomically.
Step 2: Calculate the new value
10 + 5 = 15, so int32[0] becomes 15.
Final Answer:
15 -> Option C
Quick Check:
Atomics.add adds value safely = 15 [OK]

Quick Trick: Atomics.add adds value and returns old value, array updates [OK]

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