Node.js NPM & Package Management 2

Question 1

What does the `--save-exact` flag do when running `npm install`?

Accepted Answer

Pins the exact version instead of using a caret range

Answer

`--save-exact` records the precise installed version (e.g., `1.2.3`) rather than a range like `^1.2.3`.

Question 2

Which npm command removes a package from node_modules AND from package.json?

Accepted Answer

npm uninstall

Answer

`npm uninstall <pkg>` removes the package from node_modules and updates package.json and package-lock.json.

Question 3

What is the purpose of `npm ci` compared to `npm install`?

Accepted Answer

It installs from package-lock.json exactly, deleting node_modules first

Answer

`npm ci` deletes node_modules then installs exactly what package-lock.json specifies, ensuring reproducible builds.

Question 4

Which file should you commit to version control to lock dependency versions for a library package?

Accepted Answer

Both package.json and package-lock.json

Answer

Both package.json and package-lock.json should be committed; package-lock.json ensures reproducible installs across environments.

Question 5

How do you view all globally installed npm packages?

Accepted Answer

npm list -g --depth=0

Answer

`npm list -g --depth=0` shows top-level globally installed packages without listing their sub-dependencies.

Node.js Practice Test