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

❓ Quiz Question

Oct 25, 2026

Quiz: In Docker Compose YAML, what is the architectural function of the 'depends_on' configuration key?

… shutdown sequencing between services when executing docker compose up .

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❓ Quiz Question

Aug 12, 2026

Quiz: What is the main benefit of Docker Multi-Stage builds?

Multi-stage builds allow you to use intermediate images for compiling binaries and then copy only the finalized artifact into a slim production base image (e.g. alpine).

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❓ Quiz Question

Aug 30, 2026

Quiz: What command executes an interactive bash shell inside a running container named `my_app`?

docker exec -it opens an interactive pseudo-TTY session inside an already running container process.

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❓ Quiz Question

Aug 30, 2026

Quiz: Which command tails real-time output log streams from a running container named `web`?

docker logs -f streams live standard output and standard error logs from the target container.

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❓ Quiz Question

Aug 30, 2026

Quiz: What command cleans up stopped containers, unused networks, dangling images, and build cache in one command?

docker system prune frees disk space by removing unused container data resources.

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❓ Quiz Question

Aug 30, 2026

Quiz: What causes a container process to exit with Status Code 137?

Exit code 137 occurs when container memory usage exceeds cgroup limits, causing kernel OOM killer termination.

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❓ Quiz Question

Aug 30, 2026

Quiz: What security risk occurs when running containers with the `--privileged` flag?

The --privileged flag gives the container near-total access to host kernel capabilities, posing severe security risks.

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❓ Quiz Question

Aug 30, 2026

Quiz: Why are Distroless base images (e.g. `gcr.io/distroless/python3`) recommended for production container security?

Distroless images remove package managers and shell binaries, eliminating common exploitation targets.

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