os.platform and os.arch in Node.js - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of os.platform() on Windows

What will be the output of the following Node.js code snippet when run on a Windows machine?

Node.js

import os from 'os';
console.log(os.platform());

A "win32"

B "windows"

C "windows_nt"

D "win64"

💡 Hint

Think about the exact string Node.js uses internally for Windows platform.

Node.js returns "win32" for Windows platforms regardless of 32-bit or 64-bit architecture.

❓ Predict Output

intermediate

Output of os.arch() on 64-bit Linux

What will be the output of this Node.js code on a 64-bit Linux system?

Node.js

import os from 'os';
console.log(os.arch());

A "linux64"

B "x86_64"

C "amd64"

D "x64"

💡 Hint

Check the exact string Node.js returns for 64-bit architecture.

Node.js returns "x64" for 64-bit architectures in os.arch().

❓ component_behavior

advanced

Behavior of os.platform() and os.arch() in cross-platform script

Consider a Node.js script that logs os.platform() and os.arch(). What will be the output if the script runs on a 32-bit Windows machine?

Node.js

import os from 'os';
console.log(`${os.platform()}-${os.arch()}`);

A "windows-x86"

B "win32-x86"

C "win32-ia32"

D "win32-x64"

💡 Hint

Remember the exact architecture string for 32-bit Windows in Node.js.

On 32-bit Windows, os.platform() returns "win32" and os.arch() returns "ia32".

📝 Syntax

advanced

Correct import and usage of os module for platform and arch

Which of the following code snippets correctly imports the os module and logs platform and architecture in Node.js ES modules?

A

import os from 'os';
console.log(os.platform(), os.arch());

B

const os = require('os');
console.log(os.platform(), os.arch());

C

import { platform, arch } from 'os';
console.log(platform(), arch());

D

import * as os from 'os';
console.log(os.platform(), os.arch());

💡 Hint

Consider ES module syntax and how the os module exports functions. Both default and namespace imports work for CommonJS modules.

In ES modules, Node.js supports default import import os from 'os'; and namespace import import * as os from 'os'; for CommonJS modules like 'os', allowing access to os.platform() and os.arch(). Option B uses CommonJS require. Option C fails because the os module does not provide named exports for platform and arch.

❓ Predict Output

expert

Output when accessing os.arch without calling it

What will be the output of this code when run in a Node.js ES modules environment?

Node.js

import os from 'os';
console.log(os.arch);

A "[Function: arch]"

B TypeError: os.arch is not a function

C SyntaxError: Unexpected token import

D ReferenceError: os is not defined

💡 Hint

Check if os.arch is called as a function or accessed as a property. Without parentheses, it references the function itself.

No error is produced. os.arch is a function, so console.log(os.arch) without parentheses logs the function object, which Node.js console displays as [Function: arch].