PCDOE Building and implementing CI/CD pipelines Practice Question
This PCDOE practice question tests your understanding of building and implementing ci/cd pipelines. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company uses Cloud Build to compile a Java application. The build takes 15 minutes due to dependency downloads. They want to cache the Maven dependencies to speed up subsequent builds. What is the best approach?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Cloud Build's built-in caching mechanism by specifying volumes.
Option B is correct because Cloud Build supports volumes that can be used to cache directories between builds. Option A is possible but less integrated. Option C is not for Maven specificly. Option D is not a native Cloud Build feature.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use a Cloud Storage bucket to store the .m2 directory and restore it at the start of the build.
Why it's wrong here
While possible, it requires manual scripting and is less performant than volumes.
✗
Use a Docker layer caching with a custom image that includes dependencies.
Why it's wrong here
Docker layer caching helps with Docker builds, not Maven dependency downloads.
✓
Use Cloud Build's built-in caching mechanism by specifying volumes.
Why this is correct
Cloud Build volumes persist data across steps and builds, ideal for caching dependencies.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use Cloud Build's 'cache' configuration to persist directories.
Why it's wrong here
Cloud Build does not have a 'cache' configuration; volumes are the recommended approach.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCDOE NAT questions on configuration and troubleshooting.
Building and implementing CI/CD pipelines — This question tests Building and implementing CI/CD pipelines — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use Cloud Build's built-in caching mechanism by specifying volumes. — Option B is correct because Cloud Build supports volumes that can be used to cache directories between builds. Option A is possible but less integrated. Option C is not for Maven specificly. Option D is not a native Cloud Build feature.
What should I do if I get this PCDOE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCDOE NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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