The answer is to set a lifecycle rule that transitions objects to Nearline storage after 30 days and then to Archive storage after 6 months. This two-step rule directly matches the access pattern of frequent use for the first month, followed by rare access for half a year, and then long-term archival for seven years, minimizing costs by moving data to progressively cheaper storage classes as its retrieval frequency drops. On the Google Professional Cloud Database Engineer exam, this scenario tests your understanding of custom lifecycle management versus Autoclass; the trap is assuming Autoclass is always best, but it applies a single, automated policy that may not align with a precise 30-day/6-month schedule, whereas custom rules offer exact control. A helpful memory tip is “30 to Near, 6 to Archive” — think of the numbers as a timeline: after 30 days, go to Nearline; after 6 months, go to Archive.
PCDE Plan and manage database infrastructure Practice Question
This PCDE practice question tests your understanding of plan and manage database infrastructure. 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 stores log files in Cloud Storage buckets. The logs are accessed frequently for the first 30 days, then rarely for the next 6 months, after which they must be archived for 7 years. They want to minimize storage costs. Which two actions should they take? (Choose two.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Keep objects in Standard storage class for the entire retention period.
Why wrong: Standard is expensive for rarely accessed data.
B
Set a lifecycle rule to change storage class to Nearline after 30 days.
Nearline is cost-effective for data accessed less than once a month.
C
Set a lifecycle rule to delete the objects after 30 days.
Why wrong: Data is needed for 6 months.
D
Enable Autoclass to automatically transition objects to colder storage classes.
Why wrong: Autoclass uses a default schedule (e.g., 30 days to Nearline, 90 to Coldline, 365 to Archive) which may not match requirements exactly; custom rules are better.
E
Set a lifecycle rule to change storage class to Archive after 6 months.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set a lifecycle rule to change storage class to Nearline after 30 days.
Options B and C are correct: they should transition to Nearline after 30 days, and then to Archive after 6 months. Option A is wrong because autoclass is a single setting that automatically transitions, but it may not precisely match the 30-day/6-month schedule; custom lifecycle rules give more control. Option D is wrong because deleting after 30 days loses data needed for 6 months. Option E is wrong because Standard class is the most expensive; not cost-effective for rare access. Correct: B and C.
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.
✗
Keep objects in Standard storage class for the entire retention period.
Why it's wrong here
Standard is expensive for rarely accessed data.
✓
Set a lifecycle rule to change storage class to Nearline after 30 days.
Why this is correct
Nearline is cost-effective for data accessed less than once a month.
Clue confirmation
The clue words "first", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set a lifecycle rule to delete the objects after 30 days.
Why it's wrong here
Data is needed for 6 months.
✗
Enable Autoclass to automatically transition objects to colder storage classes.
Why it's wrong here
Autoclass uses a default schedule (e.g., 30 days to Nearline, 90 to Coldline, 365 to Archive) which may not match requirements exactly; custom rules are better.
✓
Set a lifecycle rule to change storage class to Archive after 6 months.
Why this is correct
Archive is the cheapest for long-term archival.
Clue confirmation
The clue words "first", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which PCDE 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.
Plan and manage database infrastructure — This question tests Plan and manage database infrastructure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set a lifecycle rule to change storage class to Nearline after 30 days. — Options B and C are correct: they should transition to Nearline after 30 days, and then to Archive after 6 months. Option A is wrong because autoclass is a single setting that automatically transitions, but it may not precisely match the 30-day/6-month schedule; custom lifecycle rules give more control. Option D is wrong because deleting after 30 days loses data needed for 6 months. Option E is wrong because Standard class is the most expensive; not cost-effective for rare access. Correct: B and C.
What should I do if I get this PCDE question wrong?
Identify which PCDE 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: "first", "minimum / minimize". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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