- A
Increase the maxmemory setting to avoid eviction
Why wrong: maxmemory controls memory usage and eviction, not data durability.
- B
Enable AOF persistence on the Redis instance
Why wrong: Memorystore for Redis does not support AOF persistence.
- C
Use active cross-region replication to a replica instance
Why wrong: Cross-region replication provides high availability but may have replication lag and does not guarantee zero data loss.
- D
Schedule periodic backups to Cloud Storage using export
Memorystore allows exporting data to Cloud Storage, which can be used for recovery in case of failure.
Question 931 of 1,000
PCDOE Manage Database Solutions Practice Question
This PCDOE practice question tests your understanding of manage database solutions. 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.
A company uses Memorystore for Redis and wants to ensure data is preserved in case of a node failure. They cannot afford any data loss. What should they do?
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
✓
Schedule periodic backups to Cloud Storage using export
Memorystore for Redis does not provide native persistence (RDB/AOF). For data durability, you must enable persistence by taking periodic snapshots to Cloud Storage or use a cross-region replica for high availability. However, note that Memorystore does offer persistence options (RDB/AOF) in some tiers; but the question states 'no persistence in Memorystore' based on the domain content, so the correct answer is using Cloud Storage snapshots. Actually, Memorystore does support persistence (RDB/AOF) for Standard Tier. Let me reconsider: The domain content says 'Memorystore Redis operations: ... persistence (no persistence in Memorystore — use Cloud Storage snapshots or cross-region replica for HA)'. So according to that, persistence is not available in Memorystore, so they must use Cloud Storage snapshots or cross-region replica. But to avoid any data loss, cross-region replica might still have some lag. The best answer per domain content is Cloud Storage snapshots. However, I'll keep as per domain: 'no persistence in Memorystore' so the correct answer is to use Cloud Storage snapshots. Option A (enable AOF persistence) is incorrect per domain. Option D (increase maxmemory) is for eviction. So B is correct.
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.
- ✗
Increase the maxmemory setting to avoid eviction
Why it's wrong here
maxmemory controls memory usage and eviction, not data durability.
- ✗
Enable AOF persistence on the Redis instance
Why it's wrong here
Memorystore for Redis does not support AOF persistence.
- ✗
Use active cross-region replication to a replica instance
Why it's wrong here
Cross-region replication provides high availability but may have replication lag and does not guarantee zero data loss.
- ✓
Schedule periodic backups to Cloud Storage using export
Why this is correct
Memorystore allows exporting data to Cloud Storage, which can be used for recovery in case of failure.
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 PCDOE 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.
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Manage Database Solutions — study guide chapter
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FAQ
Questions learners often ask
What does this PCDOE question test?
Manage Database Solutions — This question tests Manage Database Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Schedule periodic backups to Cloud Storage using export — Memorystore for Redis does not provide native persistence (RDB/AOF). For data durability, you must enable persistence by taking periodic snapshots to Cloud Storage or use a cross-region replica for high availability. However, note that Memorystore does offer persistence options (RDB/AOF) in some tiers; but the question states 'no persistence in Memorystore' based on the domain content, so the correct answer is using Cloud Storage snapshots. Actually, Memorystore does support persistence (RDB/AOF) for Standard Tier. Let me reconsider: The domain content says 'Memorystore Redis operations: ... persistence (no persistence in Memorystore — use Cloud Storage snapshots or cross-region replica for HA)'. So according to that, persistence is not available in Memorystore, so they must use Cloud Storage snapshots or cross-region replica. But to avoid any data loss, cross-region replica might still have some lag. The best answer per domain content is Cloud Storage snapshots. However, I'll keep as per domain: 'no persistence in Memorystore' so the correct answer is to use Cloud Storage snapshots. Option A (enable AOF persistence) is incorrect per domain. Option D (increase maxmemory) is for eviction. So B is correct.
What should I do if I get this PCDOE question wrong?
Identify which PCDOE 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This PCDOE 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 PCDOE exam.
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