A developer is building an image from a Dockerfile located in /home/user/myapp. The Dockerfile contains: COPY app.jar /opt/app.jar. The developer runs docker build -t myapp:1.0 /home/user/myapp. The build fails with 'COPY failed: file not found'. What is the most likely cause?

app.jar is not in the build context directory /home/user/myapp.

The COPY instruction requires the source to be a URL.

The image tag 'myapp:1.0' is invalid.

The Dockerfile is not named 'Dockerfile'.

A database container uses a named volume for data persistence. The administrator accidentally runs docker rm -v on the container, which removes the container and its associated anonymous volumes. The named volume 'dbdata' is not removed. What is the state of the data?

The data is still available in the named volume 'dbdata' and can be reused by a new container.

The data is lost because -v removes all volumes associated with the container.

The data is moved to an anonymous volume during removal.

The data is lost because the container was removed.

LPIC-3 Virtualization and Containerization

Domain 2Objective 3

352.3 Docker (weight: 9) LPIC-3-VIRTUALIZATION Practice Questions (Page 3)

Part of the Topic 352: Container Virtualization domain, which makes up ~32% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~11–19 in this domain), expect 3–5 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

9concepts

Questions 11–15

11foundation · easy
Which command builds a Docker image from a Dockerfile in the current directory?
Select an answer first
12application · medium
A developer is building an image from a Dockerfile located in /home/user/myapp. The Dockerfile contains: COPY app.jar /opt/app.jar. The developer runs docker build -t myapp:1.0 /home/user/myapp. The build fails with 'COPY failed: file not found'. What is the most likely cause?
Select an answer first
13foundation · easy
Which Docker image is the official image used to run a private Docker registry?
Select an answer first
14expert · hard
A database container uses a named volume for data persistence. The administrator accidentally runs docker rm -v on the container, which removes the container and its associated anonymous volumes. The named volume 'dbdata' is not removed. What is the state of the data?
Select an answer first
15foundation · easy
Which Dockerfile instruction sets the default command to run when a container is started, and can be overridden by arguments passed to docker run?
Select an answer first

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352.3 Docker (weight: 9) LPIC-3-VIRTUALIZATION Practice Questions (Page 3)

Questions 11–15

Which command builds a Docker image from a Dockerfile in the current directory?

A developer is building an image from a Dockerfile located in /home/user/myapp. The Dockerfile contains: COPY app.jar /opt/app.jar. The developer runs docker build -t myapp:1.0 /home/user/myapp. The build fails with 'COPY failed: file not found'. What is the most likely cause?

Which Docker image is the official image used to run a private Docker registry?

A database container uses a named volume for data persistence. The administrator accidentally runs docker rm -v on the container, which removes the container and its associated anonymous volumes. The named volume 'dbdata' is not removed. What is the state of the data?

Which Dockerfile instruction sets the default command to run when a container is started, and can be overridden by arguments passed to docker run?

Keep studying — Topic 352: Container Virtualization