- A
Configure a cross-region replica to provide failover and data durability.
Why wrong: Cross-region replica is not a supported feature in Memorystore for Redis, so this option does not achieve the requirement.
- B
Enable AOF persistence in Memorystore.
Enabling AOF persistence writes all operations to disk, ensuring no data loss on node failure even if persistence was previously disabled. This is the correct solution.
- C
Take regular on-demand backups using gcloud redis instances export.
Why wrong: On-demand backups are not real-time; any data written after the last backup would be lost in a node failure.
- D
Increase the maxmemory setting to store more data.
Why wrong: Increasing maxmemory does not provide any durability or replication; it only affects memory capacity.
PCDOE Memorystore Persistence Practice Question
This PCDOE practice question tests your understanding of manage database solutions. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: memorystore Persistence. 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 using Memorystore for Redis with persistence disabled. Your application requires that no data is lost in the event of a node failure. What should you do to achieve this requirement?
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 AOF persistence in Memorystore.
Option B is correct because enabling AOF (Append-Only File) persistence ensures that every write operation is logged to disk. In the event of a node failure, the data can be recovered from the AOF file, preventing data loss even though persistence was initially disabled. Option A is incorrect because Memorystore for Redis does not support cross-region replicas; replication is limited to within the same region. Option C is insufficient because on-demand backups are not real-time and data written after the last backup would be lost. Option D is irrelevant as increasing maxmemory does not provide durability.
Key principle: Memorystore Persistence
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a cross-region replica to provide failover and data durability.
Why it's wrong here
Cross-region replica is not a supported feature in Memorystore for Redis, so this option does not achieve the requirement.
- ✓
Enable AOF persistence in Memorystore.
Why this is correct
Enabling AOF persistence writes all operations to disk, ensuring no data loss on node failure even if persistence was previously disabled. This is the correct solution.
Related concept
Memorystore Persistence
- ✗
Take regular on-demand backups using gcloud redis instances export.
Why it's wrong here
On-demand backups are not real-time; any data written after the last backup would be lost in a node failure.
- ✗
Increase the maxmemory setting to store more data.
Why it's wrong here
Increasing maxmemory does not provide any durability or replication; it only affects memory capacity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common misconception is that a cross-region replica is available in Memorystore for Redis. In reality, Memorystore only supports within-region replication via Standard tier. Candidates may incorrectly assume cross-region replication is an option, but it is not supported.
Detailed technical explanation
How to think about this question
Under the hood, Memorystore for Redis with persistence disabled runs entirely in memory with no disk writes. A cross-region replica uses asynchronous replication (Redis replication protocol) to maintain a near-real-time copy in another region. During a node failure, the replica can be promoted using a manual or automated failover process, but note that asynchronous replication means a small window of data loss (sub-second) is theoretically possible; however, for most practical purposes and in the context of this exam, cross-region replication is the correct answer for 'no data lost' during a node failure scenario. Real-world considerations include network latency between regions and the trade-off between data consistency and availability.
KKey Concepts to Remember
- Memorystore Persistence
- Memorystore Replication
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 Persistence
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Memorystore Persistence Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review memorystore Persistence, 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 Persistence.
What is the correct answer to this question?
The correct answer is: Enable AOF persistence in Memorystore. — Option B is correct because enabling AOF (Append-Only File) persistence ensures that every write operation is logged to disk. In the event of a node failure, the data can be recovered from the AOF file, preventing data loss even though persistence was initially disabled. Option A is incorrect because Memorystore for Redis does not support cross-region replicas; replication is limited to within the same region. Option C is insufficient because on-demand backups are not real-time and data written after the last backup would be lost. Option D is irrelevant as increasing maxmemory does not provide durability.
What should I do if I get this PCDOE question wrong?
Review memorystore Persistence, then practise related PCDOE questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Memorystore Persistence
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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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