AI / Dependabot Interview questions
How does Dependabot interact with lock files (e.g., package-lock.json, Gemfile.lock)?
When Dependabot updates a dependency, it doesn't just bump the version number in the primary manifest file
(package.json, Gemfile) — it also updates the corresponding lock file
(package-lock.json, Gemfile.lock) to reflect the exact resolved version and its own
transitive dependency tree, keeping both files consistent with each other in the same commit.
flowchart LR
A[Dependabot bumps version in package.json] --> B[Also regenerates package-lock.json to match]
B --> C[Both files committed together in one consistent PR]
This matters because a manifest and lock file that disagree (a manifest claiming one version while the lock file still resolves to an older one) can cause confusing, hard-to-reproduce build inconsistencies — Dependabot's PRs are specifically designed to keep these files in lockstep agreement, exactly the discipline a developer manually bumping a version number by hand can easily forget to maintain.
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