Google PCA Design and plan a cloud solution architecture Practice Question
This PCA practice question tests your understanding of design and plan a cloud solution architecture. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
gcloud compute instances get-serial-port-output instance-1 --zone=us-central1-a
[ 0.000000] Linux version 5.10.0-26-cloud-amd64 (debian-kernel@lists.debian.org) ...
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.10.0-26-cloud-amd64 root=PARTUUID=xxx ro console=ttyS0,115200n8 net.ifnames=0
...
[ 1.234567] systemd[1]: Starting Google Compute Engine Guest Agent...
[ 1.345678] systemd[1]: Starting Google Compute Engine Startup Scripts...
[ 2.345678] startup-script: INFO Found startup script in metadata: key=startup-script, content=...
[ 2.456789] startup-script: INFO Executing startup script...
[ 2.567890] startup-script: ERROR: Could not find resource 'gs://my-bucket/startup.sh'
[ 2.678901] startup-script: ERROR: script returned exit code 1
[ 2.789012] systemd[1]: google-startup-scripts.service: Main process exited, code=exited, status=1/FAILURE
Refer to the exhibit. An engineer created an instance with a startup script that references a Cloud Storage bucket. The instance boots but the startup script fails. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
gcloud compute instances get-serial-port-output instance-1 --zone=us-central1-a
[ 0.000000] Linux version 5.10.0-26-cloud-amd64 (debian-kernel@lists.debian.org) ...
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.10.0-26-cloud-amd64 root=PARTUUID=xxx ro console=ttyS0,115200n8 net.ifnames=0
...
[ 1.234567] systemd[1]: Starting Google Compute Engine Guest Agent...
[ 1.345678] systemd[1]: Starting Google Compute Engine Startup Scripts...
[ 2.345678] startup-script: INFO Found startup script in metadata: key=startup-script, content=...
[ 2.456789] startup-script: INFO Executing startup script...
[ 2.567890] startup-script: ERROR: Could not find resource 'gs://my-bucket/startup.sh'
[ 2.678901] startup-script: ERROR: script returned exit code 1
[ 2.789012] systemd[1]: google-startup-scripts.service: Main process exited, code=exited, status=1/FAILURE
A
The Cloud Storage bucket 'my-bucket' does not exist or the object 'startup.sh' is missing.
The error 'Could not find resource' indicates the bucket or object does not exist.
B
The startup script is not executable.
Why wrong: The script is being executed; the error occurs when trying to fetch the script from GCS.
C
The instance does not have the appropriate IAM permissions to read from Cloud Storage.
Why wrong: While permission issues are possible, the error message specifically says 'Could not find resource', not a permission denied error. Permission denied would typically return a 403 error.
D
The instance has no network connectivity to access Cloud Storage.
Why wrong: Network connectivity would likely result in a timeout or connection refused, not a 'Could not find resource' error.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The Cloud Storage bucket 'my-bucket' does not exist or the object 'startup.sh' is missing.
The error message indicates that the startup script cannot find the resource at gs://my-bucket/startup.sh. This could be because the bucket does not exist, the object does not exist, or the instance does not have permission to access the bucket. Given that the bucket is named 'my-bucket', it's likely that the bucket does not exist or the name is incorrect.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
The Cloud Storage bucket 'my-bucket' does not exist or the object 'startup.sh' is missing.
Why this is correct
The error 'Could not find resource' indicates the bucket or object does not exist.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The startup script is not executable.
Why it's wrong here
The script is being executed; the error occurs when trying to fetch the script from GCS.
✗
The instance does not have the appropriate IAM permissions to read from Cloud Storage.
Why it's wrong here
While permission issues are possible, the error message specifically says 'Could not find resource', not a permission denied error. Permission denied would typically return a 403 error.
✗
The instance has no network connectivity to access Cloud Storage.
Why it's wrong here
Network connectivity would likely result in a timeout or connection refused, not a 'Could not find resource' error.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Identify which PCA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Design and plan a cloud solution architecture — This question tests Design and plan a cloud solution architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Cloud Storage bucket 'my-bucket' does not exist or the object 'startup.sh' is missing. — The error message indicates that the startup script cannot find the resource at gs://my-bucket/startup.sh. This could be because the bucket does not exist, the object does not exist, or the instance does not have permission to access the bucket. Given that the bucket is named 'my-bucket', it's likely that the bucket does not exist or the name is incorrect.
What should I do if I get this PCA question wrong?
Identify which PCA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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