Teach Cloud - Cloud, DevOps, and Python Backend Development Blog

❓ Quiz Question

Aug 30, 2026

Quiz: What is the function of the `ARG` instruction in a Dockerfile?

ARG variables exist only during image build phase, whereas ENV variables persist in runtime containers.

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❓ Quiz Question

Aug 30, 2026

Buildx leverages BuildKit to build multi-arch container images concurrently.

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❓ Quiz Question

Aug 30, 2026

ENTRYPOINT specifies the container executable, while CMD provides default arguments that can easily be overridden.

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❓ Quiz Question

Aug 30, 2026

The host network driver removes network isolation between container and host OS, sharing host network interfaces directly.

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❓ Quiz Question

Aug 30, 2026

The -d (detached) flag runs compose containers in background execution mode.

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❓ Quiz Question

Aug 30, 2026

Copy-on-Write minimizes storage overhead by sharing underlying image layer files until modified in the top container layer.

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❓ Quiz Question

Aug 30, 2026

The HEALTHCHECK instruction specifies a command to regularly test whether the containerized app is functioning correctly.

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❓ Quiz Question

Aug 30, 2026

EXPOSE documents intended container ports; -p (port publishing) maps actual host network sockets to container ports.

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