AI / RenovateBot Interview Questions

What is the difference between Renovate's 'pin' and 'digest' update types?

Renovate classifies PRs with update types beyond major/minor/patch. Understanding pin and digest helps configure automerge correctly.

All Renovate update types
Type	Meaning	Example
major	Breaking change	1.x.x → 2.0.0
minor	New features, backward-compatible	1.2.x → 1.3.0
patch	Bug fixes, backward-compatible	1.2.3 → 1.2.4
pin	Convert range to exact pinned version	^1.2.0 → 1.2.3
digest	Update a SHA digest — same tag, new underlying content	sha256:abc → sha256:def
replacement	A package has been renamed by its author	request → node-fetch

{
  "packageRules": [
    {
      "matchUpdateTypes": ["pin"],
      "automerge": true,
      "groupName": "Pin dependencies"
    },
    {
      "matchUpdateTypes": ["digest"],
      "automerge": true,
      "schedule": ["at any time"]
    },
    {
      "matchUpdateTypes": ["replacement"],
      "labels": ["dependency-replacement"],
      "automerge": false
    }
  ]
}

Take quiz

What is the difference between a 'patch' and 'digest' update type in Renovate?They are the same — 'digest' is the internal name for patch updates

✗ Try again.

'patch' is a semver version number bump (e.g. 1.2.3 → 1.2.4); 'digest' updates the immutable SHA hash of a Docker image or Action that uses the same tag but whose underlying content changed

✓ Correct! Well done.

'digest' updates are always automerged; 'patch' requires review

✗ Try again.

'patch' applies to npm only; 'digest' applies to Docker images only

✗ Try again.

Why is it safe to automerge 'pin' update type PRs?Pin PRs change very little code so they are likely to pass CI

✗ Try again.

Pin PRs are purely structural — they convert a version range to the exact version already resolved in the lockfile, making no functional change to what actually runs

✓ Correct! Well done.

Automerge for pin updates is required by Renovate's internal logic

✗ Try again.

Pin PRs are created only for devDependencies

✗ Try again.

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AI / RenovateBot Interview Questions

What is the difference between Renovate's 'pin' and 'digest' update types?

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