Node.js NPM & Package Management 3

Question 1

Which npm script lifecycle hook runs automatically BEFORE the `build` script?

Accepted Answer

prebuild

Answer

npm automatically runs a script named `prebuild` before the `build` script, following the `pre<scriptname>` convention.

Question 2

What does the caret (`^`) range in `"express": "^4.18.0"` allow?

Accepted Answer

Any version >=4.18.0 and <5.0.0

Answer

The caret allows compatible updates: it pins the major version and allows minor and patch updates, so `>=4.18.0 <5.0.0`.

Question 3

How do you run a locally installed CLI tool (in node_modules/.bin) without adding it to PATH?

Accepted Answer

npx

Answer

`npx <tool>` executes a binary from node_modules/.bin (or downloads it temporarily) without needing a global install.

Question 4

What command publishes a package to the npm registry?

Accepted Answer

npm publish

Answer

`npm publish` uploads the package to the registry, making it available for others to install.

Question 5

Which field in package.json specifies the entry point file of a Node.js module?

Accepted Answer

main

Answer

The `main` field defines the file that is loaded when the package is `require()`d by another module.

Node.js Practice Test