← SOA-C02·Amazon Web Services

Question 1,179 of 1,546

Deployment, Provisioning, and Automation →mediumMultiple ChoiceObjective-mapped

Quick Answer

The correct answer is to create a new Multi-AZ RDS DB instance with read replicas outside of Elastic Beanstalk, update the environment properties to point to the new database, and then delete the old DB instance. This is necessary because Elastic Beanstalk treats an RDS instance created within the environment as a tightly coupled resource; it cannot modify that instance to enable Multi-AZ or add read replicas after creation. The core concept here is database decoupling—for production workloads requiring high availability and read scaling, you must manage the RDS instance independently from the Elastic Beanstalk environment. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of Elastic Beanstalk’s lifecycle limitations and the recommended pattern of separating stateful resources from stateless application tiers. A common trap is assuming you can simply modify the environment’s database settings, but Elastic Beanstalk only supports Multi-AZ and read replicas on externally created RDS instances. Memory tip: "Decouple to scale and survive"—if you need Multi-AZ or read replicas, take the database out of the Beanstalk environment.

SOA-C02 Deployment, Provisioning, and Automation Practice Question

This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. 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.

A SysOps administrator is deploying a new web application using AWS Elastic Beanstalk. The application requires a high-performance relational database that can scale read capacity. The administrator needs to ensure that the database is highly available and can handle read replicas. The administrator creates an Elastic Beanstalk environment and adds an Amazon RDS DB instance. However, the database is deployed in a single Availability Zone. The administrator wants to modify the environment to use a Multi-AZ deployment for high availability and add read replicas. The administrator has the following options. Which option should the administrator choose?

Question 1mediummultiple choice

Full question →

A
Increase the DB instance class size to improve performance and then create a read replica.
Why wrong: Instance class size does not provide high availability.
B
Create a read replica of the existing DB instance and then modify the environment to use the replica.
Why wrong: Read replicas require the source to have backups enabled, and the environment may not handle the switch.
C
Create a new Multi-AZ RDS DB instance with read replicas outside of Elastic Beanstalk. Update the environment's environment properties to point to the new database. Then delete the old DB instance.
Decoupling the database allows full control over configuration.
D
Modify the Elastic Beanstalk environment configuration to enable Multi-AZ for the existing DB instance.
Why wrong: Elastic Beanstalk does not support modifying the DB to Multi-AZ after creation.

Full breakdown with real-world context →

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

✓

Create a new Multi-AZ RDS DB instance with read replicas outside of Elastic Beanstalk. Update the environment's environment properties to point to the new database. Then delete the old DB instance.

Option A is correct because Elastic Beanstalk cannot add Multi-AZ or read replicas to an RDS instance that was created as part of the environment; the recommended approach is to decouple the database by creating a separate RDS instance outside of Elastic Beanstalk and then configuring the environment to connect to it. Option B is wrong because Elastic Beanstalk does not support converting a single-AZ DB to Multi-AZ after creation. Option C is wrong because read replicas require Multi-AZ or single-AZ with backups, but the environment's DB is not easily modified. Option D is wrong because increasing DB instance class does not provide Multi-AZ.

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.

✗
Increase the DB instance class size to improve performance and then create a read replica.
Why it's wrong here
Instance class size does not provide high availability.
✗
Create a read replica of the existing DB instance and then modify the environment to use the replica.
Why it's wrong here
Read replicas require the source to have backups enabled, and the environment may not handle the switch.
✓
Create a new Multi-AZ RDS DB instance with read replicas outside of Elastic Beanstalk. Update the environment's environment properties to point to the new database. Then delete the old DB instance.
Why this is correct
Decoupling the database allows full control over configuration.
Related concept
Read the scenario before looking for a memorised answer.
✗
Modify the Elastic Beanstalk environment configuration to enable Multi-AZ for the existing DB instance.
Why it's wrong here
Elastic Beanstalk does not support modifying the DB to Multi-AZ after creation.

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.

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FAQ

Questions learners often ask

What does this SOA-C02 question test?

Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Create a new Multi-AZ RDS DB instance with read replicas outside of Elastic Beanstalk. Update the environment's environment properties to point to the new database. Then delete the old DB instance. — Option A is correct because Elastic Beanstalk cannot add Multi-AZ or read replicas to an RDS instance that was created as part of the environment; the recommended approach is to decouple the database by creating a separate RDS instance outside of Elastic Beanstalk and then configuring the environment to connect to it. Option B is wrong because Elastic Beanstalk does not support converting a single-AZ DB to Multi-AZ after creation. Option C is wrong because read replicas require Multi-AZ or single-AZ with backups, but the environment's DB is not easily modified. Option D is wrong because increasing DB instance class does not provide Multi-AZ.

What should I do if I get this SOA-C02 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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