What is the package.json file?

If you need to add a new library to your Node project, where would you make the change and what command would you run to update the file?

Suppose you run npm start and the script fails because the scripts section is missing in package.json. How would you fix it?

What happens if you delete the main field from package.json and then require the package from another project?

You notice that after adding a dependency, the CI build fails due to a version conflict. Walk me through how you would investigate and resolve it using package.json.

During a feature rollout, a teammate modifies the scripts section and the build script starts using a different Node version. How would you detect the cause and prevent it?

Explain why the package-lock.json file is generated alongside package.json and what could go wrong if it's omitted from source control.

Our monorepo contains dozens of services, each with its own package.json. How would you design a strategy to keep dependency versions consistent across the repo while allowing independent releases?

We need to reduce startup time for a large Node application. Discuss how you could leverage fields in package.json (like exports or type) to improve module loading and what trade‑offs exist.

If we want to enforce that all packages use a specific linting configuration, how would you use package.json fields and tooling to enforce this across multiple teams?

The company is migrating from npm to a new internal package registry and wants to phase out legacy package.json fields. Describe the architectural considerations and migration plan you would propose.

How would you set up a governance model for package.json schemas across many micro‑services to ensure security, licensing compliance, and reproducible builds at scale?

When introducing a new language feature like ES modules across all Node services, what changes to package.json would you mandate, and how would you coordinate the rollout to minimize disruption?