- A
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.
Archive is the cheapest for long-term archival.
Question 943 of 1,000
Cloud Storage Lifecycle Rules — Cost Optimization Strategy | Google PCDE Explained
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.
Quick Answer
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.
Answer choices
Why each option matters
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.
Option B is correct because Nearline storage is optimized for data accessed less than once a month, making it cost-effective for logs that are rarely accessed after 30 days. Option E is correct because Archive storage is the lowest-cost option for data that must be retained for 7 years with infrequent access, meeting the archival requirement while minimizing costs.
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
A common trap is the belief that Autoclass can replace explicit lifecycle rules for fixed retention schedules. Autoclass is designed for unpredictable access patterns and cannot guarantee transitions at specific time intervals, so it cannot meet the requirement of storing for 30 days in Standard, then transitioning to Nearline after 30 days and to Archive after 6 months.
Detailed technical explanation
How to think about this question
Cloud Storage lifecycle rules use conditions like age and storage class to automate transitions; for example, a rule with `action: SetStorageClass` and `condition: age: 30` moves objects to Nearline after 30 days. Nearline has a 30-day minimum storage duration and retrieval fees, while Archive has a 365-day minimum and higher retrieval costs, making them suitable for the described access patterns. Autoclass relies on machine learning to analyze access patterns and may not align with fixed retention schedules, potentially leaving data in more expensive classes if not accessed frequently enough to trigger a transition.
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.
TExam Day Tips
- 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Plan and manage database infrastructure — study guide chapter
Learn the concepts, then practise the questions
- →
Plan and manage database infrastructure practice questions
Targeted practice on this topic area only
- →
All PCDE questions
1,000 questions across all exam domains
- →
Google Professional Cloud Database Engineer study guide
Full concept coverage aligned to exam objectives
- →
PCDE practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related PCDE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Building and Implementing CI/CD Pipelines for a Service practice questions
Practise PCDE questions linked to Building and Implementing CI/CD Pipelines for a Service.
Bootstrapping a Google Cloud Organisation for DevOps practice questions
Practise PCDE questions linked to Bootstrapping a Google Cloud Organisation for DevOps.
Applying Site Reliability Engineering Practices to a Service practice questions
Practise PCDE questions linked to Applying Site Reliability Engineering Practices to a Service.
Implementing Service Monitoring Strategies practice questions
Practise PCDE questions linked to Implementing Service Monitoring Strategies.
Optimising Service Performance practice questions
Practise PCDE questions linked to Optimising Service Performance.
Plan and manage database infrastructure practice questions
Practise PCDE questions linked to Plan and manage database infrastructure.
Define data structures and implement SQL for Business Intelligence practice questions
Practise PCDE questions linked to Define data structures and implement SQL for Business Intelligence.
Design and implement database schemas practice questions
Practise PCDE questions linked to Design and implement database schemas.
Monitor and optimize database performance practice questions
Practise PCDE questions linked to Monitor and optimize database performance.
PCDE fundamentals practice questions
Practise PCDE questions linked to PCDE fundamentals.
PCDE scenario practice questions
Practise PCDE questions linked to PCDE scenario.
PCDE troubleshooting practice questions
Practise PCDE questions linked to PCDE troubleshooting.
Practice this exam
Start a free PCDE practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this PCDE question test?
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. — Option B is correct because Nearline storage is optimized for data accessed less than once a month, making it cost-effective for logs that are rarely accessed after 30 days. Option E is correct because Archive storage is the lowest-cost option for data that must be retained for 7 years with infrequent access, meeting the archival requirement while minimizing costs.
What should I do if I get this PCDE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More PCDE practice questions
- A company stores sensor data in BigQuery. They have a table 'sensor_readings' with columns: sensor_id, reading_time, val…
- Which THREE are valid considerations when designing BigQuery tables for BI reporting?
- A company uses Cloud Build to build Docker images. They want to cache intermediate layers to speed up subsequent builds.…
- A company is adopting GitOps for their GKE clusters using Config Sync. They need to meet the following requirements: (1)…
- A team is migrating an on-premises PostgreSQL database to Cloud SQL for PostgreSQL. The existing schema uses a large num…
- A DevOps engineer is setting up Docker credential helper for Artifact Registry on a Cloud Build worker. They want the bu…
Last reviewed: Jul 4, 2026
This PCDE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCDE exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.