- A
Add an Amazon ElastiCache cluster to cache frequent database queries.
Why wrong: While helpful, it adds cost and complexity; the three chosen actions are more critical for resilience.
- B
Use dedicated instances for the EC2 instances to ensure consistent performance.
Why wrong: Dedicated instances are costly and not necessary for resilience.
- C
Switch the Elastic Beanstalk environment to a load-balanced, auto-scaled environment with a minimum of 2 instances across 2 Availability Zones.
Provides compute resilience and scalability.
- D
Enable Multi-AZ deployment for the RDS instance to provide a standby in another AZ.
Provides database high availability.
- E
Add Amazon RDS Proxy in front of the RDS instance to handle connection pooling.
Helps manage database connections during high traffic, improving resilience.
DOP-C02 Elastic Beanstalk Auto Scaling Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud solutions. 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: elastic Beanstalk Auto Scaling. 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 startup runs a stateless web application on AWS Elastic Beanstalk with a single environment. The application uses an Amazon RDS for MySQL database instance. The startup is preparing for a marketing campaign that is expected to increase traffic by 10x. The CTO is concerned about the application's ability to handle the load and wants to ensure high availability and resilience. The current architecture has a single RDS instance (db.t3.medium) and a single Elastic Beanstalk environment with one EC2 instance (t3.medium). The startup has a limited budget but wants to improve resilience without over-provisioning. Which combination of actions should the DevOps engineer recommend? (Choose THREE.)
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
Switch the Elastic Beanstalk environment to a load-balanced, auto-scaled environment with a minimum of 2 instances across 2 Availability Zones.
Option C is correct because switching to a load-balanced, auto-scaled environment with a minimum of 2 instances across 2 Availability Zones improves availability and resilience by distributing traffic and providing failover capacity. Option D is correct because enabling Multi-AZ for RDS provides a standby replica in a different Availability Zone, ensuring automatic failover and high availability for the database. Option E is correct because Amazon RDS Proxy manages database connections efficiently, reducing connection overhead and improving scalability during traffic spikes. Option A (ElastiCache) is an additional cost that may not be necessary if caching is not a primary concern; the focus should be on core resilience first. Option B (dedicated instances) adds unnecessary cost and does not directly address high availability or resilience.
Key principle: Elastic Beanstalk Auto Scaling
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add an Amazon ElastiCache cluster to cache frequent database queries.
Why it's wrong here
While helpful, it adds cost and complexity; the three chosen actions are more critical for resilience.
- ✗
Use dedicated instances for the EC2 instances to ensure consistent performance.
Why it's wrong here
Dedicated instances are costly and not necessary for resilience.
- ✓
Switch the Elastic Beanstalk environment to a load-balanced, auto-scaled environment with a minimum of 2 instances across 2 Availability Zones.
Why this is correct
Provides compute resilience and scalability.
Related concept
Elastic Beanstalk Auto Scaling
- ✓
Enable Multi-AZ deployment for the RDS instance to provide a standby in another AZ.
Why this is correct
Provides database high availability.
Related concept
Elastic Beanstalk Auto Scaling
- ✓
Add Amazon RDS Proxy in front of the RDS instance to handle connection pooling.
Why this is correct
Helps manage database connections during high traffic, improving resilience.
Related concept
Elastic Beanstalk Auto Scaling
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common pitfall is to over-invest in caching (ElastiCache) or instance performance (dedicated instances) before ensuring basic redundancy. The key is to first achieve multi-AZ deployment for both compute and database layers.
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
- Elastic Beanstalk Auto Scaling
- RDS Multi-AZ
- RDS Proxy
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
Elastic Beanstalk Auto Scaling
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Review elastic Beanstalk Auto Scaling, then practise related DOP-C02 questions on the same topic to reinforce the concept.
- →
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Elastic Beanstalk Auto Scaling.
What is the correct answer to this question?
The correct answer is: Switch the Elastic Beanstalk environment to a load-balanced, auto-scaled environment with a minimum of 2 instances across 2 Availability Zones. — Option C is correct because switching to a load-balanced, auto-scaled environment with a minimum of 2 instances across 2 Availability Zones improves availability and resilience by distributing traffic and providing failover capacity. Option D is correct because enabling Multi-AZ for RDS provides a standby replica in a different Availability Zone, ensuring automatic failover and high availability for the database. Option E is correct because Amazon RDS Proxy manages database connections efficiently, reducing connection overhead and improving scalability during traffic spikes. Option A (ElastiCache) is an additional cost that may not be necessary if caching is not a primary concern; the focus should be on core resilience first. Option B (dedicated instances) adds unnecessary cost and does not directly address high availability or resilience.
What should I do if I get this DOP-C02 question wrong?
Review elastic Beanstalk Auto Scaling, then practise related DOP-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Elastic Beanstalk Auto Scaling
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Last reviewed: Jun 20, 2026
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