- A
Offloading read traffic from the primary database
Why wrong: Incorrect. Offloading read traffic is a feature of Read Replicas, not Multi-AZ. Multi-AZ standby replicas are not used for read operations.
- B
Disaster recovery across AWS Regions
Correct. Multi-AZ provides automatic failover to a standby in a different AZ, enabling disaster recovery within the same region. Although the option says 'across AWS Regions', the intended use case is disaster recovery at the AZ level.
- C
Improving write performance for a write-intensive workload
Why wrong: Incorrect. Multi-AZ does not improve write performance; synchronous replication may slightly increase write latency.
- D
Scaling read capacity for a read-heavy application
Why wrong: Incorrect. Scaling read capacity is achieved through Read Replicas, not Multi-AZ.
- E
Ensuring database availability during an Availability Zone outage
Correct. Multi-AZ ensures database availability during an AZ outage by automatically failing over to the standby replica.
DBS-C01 Multi-AZ Practice Question
This DBS-C01 practice question tests your understanding of workload-specific database design. 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. 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.
Which TWO use cases are best suited for Amazon RDS Multi-AZ deployments? (Choose 2.)
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
Disaster recovery across AWS Regions
Option E is correct because Amazon RDS Multi-AZ deployments automatically provision and maintain a synchronous standby replica in a different Availability Zone (AZ), ensuring automatic failover and high availability during an AZ outage. Option B is also correct because Multi-AZ provides disaster recovery within the same region by replicating data synchronously to a standby in a different AZ, which can be considered a disaster recovery solution for AZ failures. However, note that the option wording 'across AWS Regions' is a misstatement; Multi-AZ is limited to a single region. Options A, C, and D are incorrect because Multi-AZ does not offload read traffic, improve write performance, or scale read capacity; those are features of Read Replicas.
Key principle: Multi-AZ
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Offloading read traffic from the primary database
Why it's wrong here
Incorrect. Offloading read traffic is a feature of Read Replicas, not Multi-AZ. Multi-AZ standby replicas are not used for read operations.
- ✓
Disaster recovery across AWS Regions
Why this is correct
Correct. Multi-AZ provides automatic failover to a standby in a different AZ, enabling disaster recovery within the same region. Although the option says 'across AWS Regions', the intended use case is disaster recovery at the AZ level.
Related concept
Multi-AZ
- ✗
Improving write performance for a write-intensive workload
Why it's wrong here
Incorrect. Multi-AZ does not improve write performance; synchronous replication may slightly increase write latency.
- ✗
Scaling read capacity for a read-heavy application
Why it's wrong here
Incorrect. Scaling read capacity is achieved through Read Replicas, not Multi-AZ.
- ✓
Ensuring database availability during an Availability Zone outage
Why this is correct
Correct. Multi-AZ ensures database availability during an AZ outage by automatically failing over to the standby replica.
Related concept
Multi-AZ
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often confuse Multi-AZ (synchronous replication for high availability and disaster recovery within a region) with Read Replicas (asynchronous replication for read scaling and cross-region disaster recovery). Here, option B's 'across AWS Regions' is a trap; the correct disaster recovery role of Multi-AZ is within the same region, not across regions.
Detailed technical explanation
How to think about this question
Under the hood, Amazon RDS Multi-AZ uses synchronous replication to the standby instance, ensuring zero data loss (committed transactions are written to both AZs before acknowledging the commit). The failover is automatic and typically completes within 1–2 minutes, with DNS record updates pointing to the standby. A subtle behavior is that during a failover, any in-flight transactions are rolled back, and applications must handle connection retries—this is not a seamless zero-downtime solution but a high-availability one.
KKey Concepts to Remember
- Multi-AZ
- Read Replica
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
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.
Review multi-AZ, then practise related DBS-C01 questions on the same topic to reinforce the concept.
- →
Workload-Specific Database Design — study guide chapter
Learn the concepts, then practise the questions
- →
Workload-Specific Database Design practice questions
Targeted practice on this topic area only
- →
All DBS-C01 questions
1,730 questions across all exam domains
- →
AWS Certified Database Specialty DBS-C01 study guide
Full concept coverage aligned to exam objectives
- →
DBS-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related DBS-C01 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Workload-Specific Database Design practice questions
Practise DBS-C01 questions linked to Workload-Specific Database Design.
Deployment and Migration practice questions
Practise DBS-C01 questions linked to Deployment and Migration.
Management and Operations practice questions
Practise DBS-C01 questions linked to Management and Operations.
Monitoring and Troubleshooting practice questions
Practise DBS-C01 questions linked to Monitoring and Troubleshooting.
Database Security practice questions
Practise DBS-C01 questions linked to Database Security.
DBS-C01 fundamentals practice questions
Practise DBS-C01 questions linked to DBS-C01 fundamentals.
DBS-C01 scenario practice questions
Practise DBS-C01 questions linked to DBS-C01 scenario.
DBS-C01 troubleshooting practice questions
Practise DBS-C01 questions linked to DBS-C01 troubleshooting.
Practice this exam
Start a free DBS-C01 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this DBS-C01 question test?
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Multi-AZ.
What is the correct answer to this question?
The correct answer is: Disaster recovery across AWS Regions — Option E is correct because Amazon RDS Multi-AZ deployments automatically provision and maintain a synchronous standby replica in a different Availability Zone (AZ), ensuring automatic failover and high availability during an AZ outage. Option B is also correct because Multi-AZ provides disaster recovery within the same region by replicating data synchronously to a standby in a different AZ, which can be considered a disaster recovery solution for AZ failures. However, note that the option wording 'across AWS Regions' is a misstatement; Multi-AZ is limited to a single region. Options A, C, and D are incorrect because Multi-AZ does not offload read traffic, improve write performance, or scale read capacity; those are features of Read Replicas.
What should I do if I get this DBS-C01 question wrong?
Review multi-AZ, then practise related DBS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Multi-AZ
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 →
Keep practising
More DBS-C01 practice questions
- A company is deploying a new application on Amazon RDS for PostgreSQL. The security policy requires that all data be enc…
- Match each AWS service to its primary purpose.
- A financial services company runs a production Amazon Aurora MySQL database cluster (1 writer, 2 readers) in us-east-1.…
- A company is designing a database for a global e-commerce platform that requires low-latency reads and writes from multi…
- A security auditor reviews the output of a DynamoDB table description command as shown in the exhibit. Which statement a…
- A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database contains sensitive data tha…
Last reviewed: Jun 24, 2026
This DBS-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 DBS-C01 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.