- A
Use AlloyDB with read replicas in the same region and Cloud SQL for on-premises
Why wrong: Cloud SQL is not AlloyDB; AlloyDB Omni is the correct on-premises solution.
- B
Use AlloyDB with a single instance and use Bigtable for on-premises
Why wrong: Bigtable is a different service and not suitable for PostgreSQL replication.
- C
Use AlloyDB with cross-region replication to another cloud region
Why wrong: Cross-region replication is for cloud regions, not on-premises.
- D
Use AlloyDB with auto-scaling read pool and AlloyDB Omni for on-premises
AlloyDB read pools auto-scale, and AlloyDB Omni can replicate to on-premises.
Question 940 of 980
Deploy Scalable and Highly Available Databases in Google Cloud →mediumMultiple ChoiceObjective-mapped
PCD Practice Question: Deploy Scalable and Highly Available Databases in Google Cloud
This PCD practice question tests your understanding of deploy scalable and highly available databases in google cloud. 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 needs to run AlloyDB for PostgreSQL with a read pool that can automatically scale based on load. They also need to run a local instance on-premises for disaster recovery. Which features should they use?
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
✓
Use AlloyDB with auto-scaling read pool and AlloyDB Omni for on-premises
AlloyDB read pools support auto-scaling. For on-premises disaster recovery, AlloyDB Omni provides a downloadable version that can run on-premises and replicate from the cloud. Cross-region replication is for cloud-to-cloud, not on-premises.
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.
- ✗
Use AlloyDB with read replicas in the same region and Cloud SQL for on-premises
Why it's wrong here
Cloud SQL is not AlloyDB; AlloyDB Omni is the correct on-premises solution.
- ✗
Use AlloyDB with a single instance and use Bigtable for on-premises
Why it's wrong here
Bigtable is a different service and not suitable for PostgreSQL replication.
- ✗
Use AlloyDB with cross-region replication to another cloud region
Why it's wrong here
Cross-region replication is for cloud regions, not on-premises.
- ✓
Use AlloyDB with auto-scaling read pool and AlloyDB Omni for on-premises
Why this is correct
AlloyDB read pools auto-scale, and AlloyDB Omni can replicate to on-premises.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which PCD 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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Deploy Scalable and Highly Available Databases in Google Cloud — study guide chapter
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FAQ
Questions learners often ask
What does this PCD question test?
Deploy Scalable and Highly Available Databases in Google Cloud — This question tests Deploy Scalable and Highly Available Databases in Google Cloud — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AlloyDB with auto-scaling read pool and AlloyDB Omni for on-premises — AlloyDB read pools support auto-scaling. For on-premises disaster recovery, AlloyDB Omni provides a downloadable version that can run on-premises and replicate from the cloud. Cross-region replication is for cloud-to-cloud, not on-premises.
What should I do if I get this PCD question wrong?
Identify which PCD 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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This PCD 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 PCD exam.
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