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One tag has to serve amd64 nodes and Graviton nodes. How does a single image reference do that?

Most candidates say the registry figures it out. The real mechanism is an index of per-platform manifests and a client-side choice at pull time, and knowing which layer makes that choice is the whole question.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

Most candidates say the registry figures it out. The real mechanism is an index of per-platform manifests and a client-side choice at pull time, and knowing which layer makes that choice is the whole question.

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Next in this trackPrivate registry pulls started failing ImagePullBackOff overnight. Walk me through the credential chain.Next in this trackYour operator is the top API consumer and etcd is sweating. Explain informers, resourceVersion and the real cost of LIST.Next in this trackPolicy webhooks enforce our security rules. Should failurePolicy be Ignore or Fail, and what does each cost?
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