[Solved] What is wrong with the following code snippet? const sab = new SharedArrayBuffer(8); const uint8 = new Uint8Array(sab); uint8[0] = 255; Atomics.store(uint8, 0, 256); console.log(uint8[0]); | Node.js

Node.js - Worker Threads

What is wrong with the following code snippet?

const sab = new SharedArrayBuffer(8);
const uint8 = new Uint8Array(sab);
uint8[0] = 255;
Atomics.store(uint8, 0, 256);
console.log(uint8[0]);

AAtomics.store cannot be used with Uint8Array

B256 is out of range for Uint8Array element

CSharedArrayBuffer size is too small

DUint8Array cannot be created from SharedArrayBuffer

Step-by-Step Solution

Solution:

Step 1: Check Uint8Array element range
Uint8Array elements can only hold values from 0 to 255. The value 256 is out of this range.
Step 2: Understand effect of storing 256
Storing 256 wraps around to 0 because 256 mod 256 = 0, so uint8[0] becomes 0, not 256.
Final Answer:
256 is out of range for Uint8Array element -> Option B
Quick Check:
Uint8 max value 255, 256 wraps to 0 [OK]

Quick Trick: Uint8Array values must be 0-255; higher values wrap [OK]

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What is wrong with the following code snippet?