SOA-C02 Reliability and Business Continuity Practice Question
This SOA-C02 practice question tests your understanding of reliability and business continuity. 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 runs a web application on EC2 instances in an Auto Scaling group behind an ALB. The application uses an RDS MySQL database. The SysOps administrator needs to improve the reliability of the database layer. Which TWO actions should the administrator take? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Multi-AZ on the RDS instance.
Multi-AZ provides automatic failover, and automated backups enable point-in-time recovery. Read replicas improve read performance but not high availability. Manual snapshots are not sufficient for automatic recovery. Larger instance class improves performance, not reliability.
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 Multi-AZ on the RDS instance.
Why this is correct
Multi-AZ provides automatic failover to a standby in another AZ.
Related concept
Read the scenario before looking for a memorised answer.
✗
Take a manual snapshot every hour.
Why it's wrong here
Manual snapshots are not automated for failover and have higher RPO.
✗
Create a read replica in a different Region.
Why it's wrong here
Read replicas are for read scaling, not automatic failover.
✓
Configure automated backups with a retention period of 30 days.
Why this is correct
Automated backups allow point-in-time recovery within the retention window.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the DB instance class to the largest available.
Why it's wrong here
Larger instance class improves performance but not reliability.
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 SOA-C02 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.
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable Multi-AZ on the RDS instance. — Multi-AZ provides automatic failover, and automated backups enable point-in-time recovery. Read replicas improve read performance but not high availability. Manual snapshots are not sufficient for automatic recovery. Larger instance class improves performance, not reliability.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 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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