- A
Increase the maxmemory setting to reduce eviction frequency.
Why wrong: Increasing maxmemory reduces eviction frequency but does not improve durability or provide zonal failover.
- B
Enable RDB persistence by setting the persistence mode.
Correct. Enabling RDB persistence saves periodic snapshots, improving durability without affecting the volatile-lru eviction policy.
- C
Configure a cross-region replica to provide failover in another region.
Why wrong: Incorrect. Memorystore does not natively support cross-region replicas; failover within a region uses Standard Tier.
- D
Create a standard tier instance with replication enabled for automatic failover.
Correct. Standard Tier with replication provides automatic failover across zones, enabling recovery from a zonal failure.
- E
Set up a Cloud Scheduler job to export the instance to Cloud Storage every hour.
Why wrong: Incorrect. Cloud Scheduler exports are manual backups that do not provide automatic recovery from zonal failures.
PCDOE Memorystore Standard Tier 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. A key principle to apply: memorystore Standard Tier. 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
Enable RDB persistence by setting the persistence mode.
Option B (Enable RDB persistence) improves data durability by taking periodic snapshots without interfering with the volatile-lru eviction policy, which only evicts keys with TTL. Option D (Standard Tier with replication) provides automatic failover across zones within a region, ensuring recovery from a zonal failure. Option A only reduces eviction frequency but does not address durability or zonal failover. Option C is incorrect because Memorystore does not support native cross-region replicas. Option E uses manual exports, which do not enable automatic recovery and are not equivalent to persistence.
Key principle: Memorystore Standard Tier
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
Increasing maxmemory reduces eviction frequency but does not improve durability or provide zonal failover.
- ✓
Enable RDB persistence by setting the persistence mode.
Why this is correct
Correct. Enabling RDB persistence saves periodic snapshots, improving durability without affecting the volatile-lru eviction policy.
Related concept
Memorystore Standard Tier
- ✗
Configure a cross-region replica to provide failover in another region.
Why it's wrong here
Incorrect. Memorystore does not natively support cross-region replicas; failover within a region uses Standard Tier.
- ✓
Create a standard tier instance with replication enabled for automatic failover.
Why this is correct
Correct. Standard Tier with replication provides automatic failover across zones, enabling recovery from a zonal failure.
Related concept
Memorystore Standard Tier
- ✗
Set up a Cloud Scheduler job to export the instance to Cloud Storage every hour.
Why it's wrong here
Incorrect. Cloud Scheduler exports are manual backups that do not provide automatic recovery from zonal failures.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often confuse cross-region replicas with the Standard Tier's zonal replication. Standard Tier provides automatic failover within a region across zones, but not across regions. Also, manual exports via Cloud Scheduler are not a substitute for built-in persistence when durability is the goal.
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
- Memorystore Standard Tier
- RDB Persistence
- volatile-lru Eviction Policy
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
Memorystore Standard Tier
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.
Review memorystore Standard Tier, then practise related PCDOE questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this PCDOE question test?
Manage Database Solutions — This question tests Manage Database Solutions — Memorystore Standard Tier.
What is the correct answer to this question?
The correct answer is: Enable RDB persistence by setting the persistence mode. — Option B (Enable RDB persistence) improves data durability by taking periodic snapshots without interfering with the volatile-lru eviction policy, which only evicts keys with TTL. Option D (Standard Tier with replication) provides automatic failover across zones within a region, ensuring recovery from a zonal failure. Option A only reduces eviction frequency but does not address durability or zonal failover. Option C is incorrect because Memorystore does not support native cross-region replicas. Option E uses manual exports, which do not enable automatic recovery and are not equivalent to persistence.
What should I do if I get this PCDOE question wrong?
Review memorystore Standard Tier, then practise related PCDOE questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Memorystore Standard Tier
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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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