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Project Planning & Execution Flashcards

7 cards from real DCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. When planning a migration of a monolithic application to Docker containers, which approach best minimizes risk?

    Answer: Strangler fig pattern — incrementally containerize one service at a time

    The strangler fig pattern reduces risk by migrating one service at a time, allowing rollback without full-system impact.

  2. A project requires Docker images to be reproducible across CI/CD pipelines. Which Dockerfile best practice ensures this?

    Answer: Pin base image versions with specific digest or tag

    Pinning base image versions with specific tags or SHA digests ensures identical builds across all environments.

  3. During sprint planning for a Docker Swarm deployment project, the team must decide on the number of manager nodes. What is the recommended minimum for high availability?

    Answer: 3 manager nodes provide HA while tolerating 1 failure

    Three manager nodes form a quorum that tolerates one node failure; two managers would lose quorum on any failure.

  4. A team is planning resource limits for containers in a production Kubernetes cluster. Which flag sets both CPU and memory limits in a Docker run command for testing?

    Answer: --cpus and --memory

    The --cpus flag limits CPU cores and --memory limits the container's maximum RAM allocation.

  5. When executing a Docker project rollout, a health check fails on new containers. What does Docker Swarm do by default?

    Answer: Pauses the rollout and keeps the previous version running

    Docker Swarm's default update failure action is 'pause', preserving the last healthy state while alerting operators.

  6. A project plan calls for image scanning before deployment. Which Docker CLI command initiates a vulnerability scan using Docker Scout?

    Answer: docker scout cves

    The 'docker scout cves' command lists known CVEs in an image using the Docker Scout service.

  7. During project execution, an operator needs to run a one-time database migration task in a running Swarm service without creating a permanent task. What is the best approach?

    Answer: Deploy a separate one-shot service with --restart-condition=none

    A service with --restart-condition=none runs once and exits cleanly, making it suitable for one-time migration jobs.

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