- A
Create a cross-region replica and use it for read traffic.
Why wrong: Memorystore does not support cross-region replicas. Cross-region replication is not available.
- B
Upgrade to a larger machine type with more memory.
Why wrong: Vertical scaling increases capacity but does not improve read throughput horizontally and does not guarantee zone failure protection beyond Standard Tier.
- C
Enable persistence using AOF and configure a backup schedule.
Why wrong: Memorystore does not support native persistence; this is not an option.
- D
Migrate to Redis Cluster with 3+ shards.
Redis Cluster provides horizontal scaling by sharding data, and with multiple shards across zones, it improves both availability and read throughput.
Question 800 of 1,000
PCDOE Manage Database Solutions 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. 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 with Standard Tier (replication) and needs to ensure data durability in case of a zone failure. They also need to scale read throughput beyond a single instance. 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
✓
Migrate to Redis Cluster with 3+ shards.
Memorystore for Redis Standard Tier provides cross-zone replication for high availability. To scale read throughput, they can use Redis Cluster (which shards data across multiple shards) or create read replicas. However, Memorystore does not support read replicas for Redis; instead, Redis Cluster provides horizontal scalability and high availability. Upgrading to a larger instance scales vertically but not read throughput horizontally. Persistence is not natively supported in Memorystore.
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.
- ✗
Create a cross-region replica and use it for read traffic.
Why it's wrong here
Memorystore does not support cross-region replicas. Cross-region replication is not available.
- ✗
Upgrade to a larger machine type with more memory.
Why it's wrong here
Vertical scaling increases capacity but does not improve read throughput horizontally and does not guarantee zone failure protection beyond Standard Tier.
- ✗
Enable persistence using AOF and configure a backup schedule.
Why it's wrong here
Memorystore does not support native persistence; this is not an option.
- ✓
Migrate to Redis Cluster with 3+ shards.
Why this is correct
Redis Cluster provides horizontal scaling by sharding data, and with multiple shards across zones, it improves both availability and read throughput.
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 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 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.
- →
Manage Database Solutions — study guide chapter
Learn the concepts, then practise the questions
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Manage Database Solutions practice 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: Migrate to Redis Cluster with 3+ shards. — Memorystore for Redis Standard Tier provides cross-zone replication for high availability. To scale read throughput, they can use Redis Cluster (which shards data across multiple shards) or create read replicas. However, Memorystore does not support read replicas for Redis; instead, Redis Cluster provides horizontal scalability and high availability. Upgrading to a larger instance scales vertically but not read throughput horizontally. Persistence is not natively supported in Memorystore.
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.
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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