Answer
Digest uniquely identifies image content. Unlike tags, digests are immutable and ensure reproducible builds.
Quick Answer
A digest is a SHA256 hash of an image's content — it uniquely and immutably identifies an exact version of an image. Unlike tags (which can be moved), a digest never changes. Pinning by digest (image@sha256:abc123...) guarantees you always pull exactly the same image, even if someone updates the tag.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ