A team maintains a Dockerfile for a Java application. The build process downloads Maven dependencies and compiles the code. The team notices that every code change triggers a full re-download of all Maven dependencies, even though `pom.xml` rarely changes. They want to optimize the build to reuse the dependency layer. Which Dockerfile change would achieve this?

Copy `pom.xml` first, run `mvn dependency:go-offline`, then copy the source and run `mvn package`

Run `mvn package` in a single RUN instruction with `COPY . .`

Use `mvn clean package` in the RUN instruction

Add `--no-transfer-progress` to the Maven command

What is a multi-arch manifest?

A list of images for different architectures that share the same tag

A list of all the layers in an image

A file that contains the build instructions for multiple architectures

A tool that converts an image from one architecture to another

What is the difference between ARG and ENV in a Dockerfile?

ARG is available during build time only; ENV is available at runtime as well

ENV is available during build time only; ARG is available at runtime

ARG is used for secrets, ENV for configuration

Both are available at build time and runtime

LPI DevOps Tools Engineer

Domain 2Objective 3

702.3 Container Image Building (weight: 5) DEVOPS-TOOLS-ENGINEER Practice Questions (Page 5)

Part of the 702 Application Container domain, which makes up ~18% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–11 in this domain), expect 2–4 from this objective — we provide 28 practice questions to prepare you well beyond it. (estimate)

28questions here

6free pages

10concepts

Questions 21–25

21expert · hard
A team maintains a Dockerfile for a Java application. The build process downloads Maven dependencies and compiles the code. The team notices that every code change triggers a full re-download of all Maven dependencies, even though `pom.xml` rarely changes. They want to optimize the build to reuse the dependency layer. Which Dockerfile change would achieve this?
Select an answer first
22foundation · easy
Which tool is commonly used to build container images for multiple CPU architectures?
Select an answer first
23foundation · easy
What is a multi-arch manifest?
Select an answer first
24foundation · easy
What is the difference between ARG and ENV in a Dockerfile?
Select an answer first
25foundation · easy
Which Containerfile instruction is used to specify the base image for a build?
Select an answer first

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702.3 Container Image Building (weight: 5) DEVOPS-TOOLS-ENGINEER Practice Questions (Page 5)

Questions 21–25

Which tool is commonly used to build container images for multiple CPU architectures?

What is a multi-arch manifest?

What is the difference between ARG and ENV in a Dockerfile?

Which Containerfile instruction is used to specify the base image for a build?

Keep studying — 702 Application Container