Answer
Image layers are read-only and shared among containers. Container layer is a thin writable layer on top where runtime changes occur.
Quick Answer
Image layers are read-only — they're shared across all containers using that image. The container layer is a thin, writable layer added on top specifically for that container. Any writes (new files, modified files) go into the container layer via copy-on-write. The image underneath is never modified.
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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