- A
Increase the maxmemory setting to reduce eviction frequency.
Why wrong: This does not improve durability or HA.
- B
Enable RDB persistence by setting the persistence mode.
Why wrong: Memorystore does not support persistence; this option is not available.
- C
Configure a cross-region replica to provide failover in another region.
A cross-region replica provides durability and failover across regions.
- D
Create a standard tier instance with replication enabled for automatic failover.
Why wrong: Standard tier with replication provides HA within a region, but the question asks for durability and recovery from zonal failure; this helps but the cross-region option is better. However, since the question asks for TWO, combining A and D addresses both durability and recovery.
- E
Set up a Cloud Scheduler job to export the instance to Cloud Storage every hour.
Regular exports provide a durable backup that can be restored if needed.
PCDOE Manage Database Solutions Practice Question
This PCDOE practice question tests your understanding of manage database solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
You are managing a Memorystore for Redis instance that is part of a high-traffic e-commerce application. The instance uses the volatile-lru eviction policy and has persistence disabled. You need to improve data durability without losing the ability to evict keys with TTL. You also want to ensure that the instance can automatically recover from a zonal failure. Which TWO actions should you take? (Choose TWO.)
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
Configure a cross-region replica to provide failover in another region.
Option C is correct because a cross-region replica provides automatic failover to another region, ensuring recovery from a zonal failure. Option E is correct because exporting the instance to Cloud Storage every hour creates periodic backups, improving data durability without interfering with the volatile-lru eviction policy, which relies on TTL-based keys.
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 reduce eviction frequency.
Why it's wrong here
This does not improve durability or HA.
- ✗
Enable RDB persistence by setting the persistence mode.
Why it's wrong here
Memorystore does not support persistence; this option is not available.
- ✓
Configure a cross-region replica to provide failover in another region.
Why this is correct
A cross-region replica provides durability and failover across regions.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a standard tier instance with replication enabled for automatic failover.
Why it's wrong here
Standard tier with replication provides HA within a region, but the question asks for durability and recovery from zonal failure; this helps but the cross-region option is better. However, since the question asks for TWO, combining A and D addresses both durability and recovery.
- ✓
Set up a Cloud Scheduler job to export the instance to Cloud Storage every hour.
Why this is correct
Regular exports provide a durable backup that can be restored if needed.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between high availability (within-region replication) and disaster recovery (cross-region failover), tricking candidates into choosing a standard tier replica for zonal failure when only a cross-region replica provides multi-zone recovery.
Detailed technical explanation
How to think about this question
Memorystore for Redis uses the volatile-lru eviction policy to evict keys with a TTL when memory is full, which is ideal for caching. Cross-region replicas leverage Redis replication (using the PSYNC protocol) to asynchronously replicate data to a secondary region, enabling failover via a manual or automated promotion. Exporting to Cloud Storage creates an RDB snapshot, which can be imported to restore data, but note that exports are point-in-time and may not capture the most recent writes, so scheduling frequency is critical for durability.
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 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Manage Database Solutions — study guide chapter
Learn the concepts, then practise the questions
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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: Configure a cross-region replica to provide failover in another region. — Option C is correct because a cross-region replica provides automatic failover to another region, ensuring recovery from a zonal failure. Option E is correct because exporting the instance to Cloud Storage every hour creates periodic backups, improving data durability without interfering with the volatile-lru eviction policy, which relies on TTL-based keys.
What should I do if I get this PCDOE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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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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