☁️ Free practice test question from: Container Orchestration (KCNA)

Storing layer differences (rather than entire copies) primarily helps you avoid redundant storage. Containers can reference a common base image, then only the changes—those incremental layers—are stored. This model saves disk space and bandwidth and is the fundamental reason most container systems adopt a layered file system.
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B) While caching is a result of the layered approach, the core advantage is the delta storage. Caching wouldn't be as effective if full copies were stored.

C) Layering contributes to security by isolating changes, but the primary security benefit comes from containerization itself (process isolation, namespaces, etc.), not specifically the delta storage.

D) Rollbacks are easier because of the layered structure and versioning enabled by the delta storage, but the core advantage is the efficient storage of differences.