Chapter quiz · Node Basics

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Node Basics — Chapter Quiz

Eight questions covering install, scripts, modules, npm.

0/ 9

Question 1
1
What is Node.js?
AA JavaScript frameworkBA JavaScript runtime that runs outside the browserCA browser engineDA TypeScript compiler
Node is a JS runtime built on V8 that runs outside the browser — it has its own APIs for files, networking, processes.
Question 2
2
Which file extension is *always* treated as an ES module?
A.jsB.mjsC.cjsD.ts
.mjs is always ESM. .cjs is always CommonJS. .js depends on package.json "type" ("module" → ESM, "commonjs" → CJS).
Question 3
3
__dirname is available by default in ESM modules.
TTrueFFalse
__dirname is CJS-only. In ESM you derive it from import.meta.url via fileURLToPath and dirname.
Question 4
4
Which command runs a script in watch mode in Node 22+?
Anode --restart script.mjsBnode --watch script.mjsCnode --hot script.mjsDnode script.mjs --reload
--watch is built into Node 22+. Re-runs your script on file changes. No nodemon needed.
Question 5
5
How do you read CLI arguments in Node?
Aprocess.argsBprocess.argvCprocess.inputDprocess.cli
process.argv is the array of command-line arguments. Slice from index 2 for the user-supplied args.
Question 6
6
The native tsc init-equivalent for Node packages is npm ___ -y.
npm init -y creates a package.json with sensible defaults.
Question 7
7
What does npx do?
AReinstalls all dependenciesBRuns a package binary without globally installing itCPublishes a package to npmDCompiles TypeScript
npx runs binaries from node_modules/.bin or downloads & runs one-off — npx create-vite my-app is the canonical example.
Question 8
8
Which prefix unambiguously refers to Node's built-in modules?
Select all that apply.
Anode: (e.g. node:fs, node:http)BNo prefix (e.g. fs, http)Cbuiltin:D@node/
Both work, but node: is recommended in modern code — it never collides with an npm package of the same name.