- A
Increase the allocated storage for the database to improve I/O performance.
Why wrong: Storage size does not directly affect failover time.
- B
Ensure that the standby instance is in the same Availability Zone as the primary.
Why wrong: Multi-AZ uses different AZs.
- C
Check for long-running transactions that delay the failover.
Long-running transactions can significantly increase failover time.
- D
Verify that the database is using asynchronous replication.
Why wrong: Multi-AZ uses synchronous replication.
Question 964 of 1,733
PAS-C01 Multi-AZ Failover Practice Question
This PAS-C01 practice question tests your understanding of operations and maintenance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. A key principle to apply: multi-AZ Failover. 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.
An SAP system running on AWS uses a Multi-AZ RDS for SAP ASE database. The operations team notices that the database failover took longer than expected during a recent outage. What should the team investigate to reduce failover time?
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
✓
Check for long-running transactions that delay the failover.
Multi-AZ failover time is primarily affected by the time required to complete in-flight transactions and apply redo logs to the standby. Long-running transactions can delay failover because they must be completed or rolled back before the standby can become the primary. Option A is incorrect because increasing storage may improve I/O performance but does not directly reduce failover time. Option B is incorrect because the standby must be in a different Availability Zone for Multi-AZ. Option D is incorrect because Multi-AZ RDS uses synchronous replication, not asynchronous.
Key principle: Multi-AZ Failover
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the allocated storage for the database to improve I/O performance.
Why it's wrong here
Storage size does not directly affect failover time.
- ✗
Ensure that the standby instance is in the same Availability Zone as the primary.
Why it's wrong here
Multi-AZ uses different AZs.
- ✓
Check for long-running transactions that delay the failover.
Why this is correct
Long-running transactions can significantly increase failover time.
Related concept
Multi-AZ Failover
- ✗
Verify that the database is using asynchronous replication.
Why it's wrong here
Multi-AZ uses synchronous replication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often assume that scaling storage or instance size will reduce failover time, but the primary delay is caused by long-running transactions that must complete before failover.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Multi-AZ Failover
- Long-Running Transactions
- Synchronous Replication
- Transaction Log Recovery
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
Multi-AZ Failover
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
Review multi-AZ Failover, then practise related PAS-C01 questions on the same topic to reinforce the concept.
- →
Operations and Maintenance — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Operations and Maintenance — This question tests Operations and Maintenance — Multi-AZ Failover.
What is the correct answer to this question?
The correct answer is: Check for long-running transactions that delay the failover. — Multi-AZ failover time is primarily affected by the time required to complete in-flight transactions and apply redo logs to the standby. Long-running transactions can delay failover because they must be completed or rolled back before the standby can become the primary. Option A is incorrect because increasing storage may improve I/O performance but does not directly reduce failover time. Option B is incorrect because the standby must be in a different Availability Zone for Multi-AZ. Option D is incorrect because Multi-AZ RDS uses synchronous replication, not asynchronous.
What should I do if I get this PAS-C01 question wrong?
Review multi-AZ Failover, then practise related PAS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Multi-AZ Failover
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Last reviewed: Jun 20, 2026
This PAS-C01 practice question is part of Courseiva's free Amazon Web Services 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 PAS-C01 exam.
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