Google PCA Practice Question: Managing Implementation and Ensuring Solution and Operations Reliability
This PCA practice question tests your understanding of managing implementation and ensuring solution and operations reliability. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Your company has a production Cloud SQL for PostgreSQL instance in us-central1 with automated backups enabled. You need to ensure that if the zone fails, the database automatically fails over to a standby in a different zone with minimal downtime. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the instance as a highly available (regional) instance.
Cloud SQL high availability (HA) configuration creates a standby instance in a different zone. The primary and standby use synchronous replication, and automatic failover occurs if the primary zone fails. Enabling deletion protection does not provide HA. Read replicas are for read scaling, not automatic failover. Automated backups alone do not provide failover.
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.
✗
Enable deletion protection on the instance.
Why it's wrong here
Deletion protection prevents accidental deletion but does not provide failover.
✗
Create a cross-region read replica and manually promote it during a failure.
Why it's wrong here
Read replicas are for read scaling; manual promotion is not automatic failover and has longer downtime.
✓
Configure the instance as a highly available (regional) instance.
Why this is correct
HA configuration creates a standby in a different zone and enables automatic failover.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable point-in-time recovery (PITR) and keep 30 days of transaction logs.
Why it's wrong here
PITR allows restoring to a point in time but does not provide automatic failover.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Identify which PCA 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.
Managing Implementation and Ensuring Solution and Operations Reliability — This question tests Managing Implementation and Ensuring Solution and Operations Reliability — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the instance as a highly available (regional) instance. — Cloud SQL high availability (HA) configuration creates a standby instance in a different zone. The primary and standby use synchronous replication, and automatic failover occurs if the primary zone fails. Enabling deletion protection does not provide HA. Read replicas are for read scaling, not automatic failover. Automated backups alone do not provide failover.
What should I do if I get this PCA question wrong?
Identify which PCA 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.
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Question Discussion
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