- A
Configure a CloudWatch alarm to restart the task
Why wrong: CloudWatch alarms can trigger SNS or Auto Scaling but not directly restart ECS tasks.
- B
Define tasks using the ECS RunTask API
Why wrong: RunTask starts a task once; it does not monitor or restart.
- C
Use an Auto Scaling group for the Fargate tasks
Why wrong: Auto Scaling groups are not used with Fargate; ECS service auto scaling is used.
- D
Create an ECS service with a desired count and task definition
ECS service maintains desired count and replaces failed tasks.
Question 598 of 1,546
SOA-C02 Reliability and Business Continuity Practice Question
This SOA-C02 practice question tests your understanding of reliability and business continuity. 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 company runs a microservices architecture on Amazon ECS with Fargate. They need to ensure that if a task fails, it is automatically restarted. Which configuration is required?
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 an ECS service with a desired count and task definition
An ECS service with a desired count and task definition ensures that Fargate tasks are automatically restarted if they fail. The ECS service scheduler monitors the desired count and replaces any stopped or failed tasks to maintain the specified number of running instances, providing built-in resilience without additional infrastructure.
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.
- ✗
Configure a CloudWatch alarm to restart the task
Why it's wrong here
CloudWatch alarms can trigger SNS or Auto Scaling but not directly restart ECS tasks.
- ✗
Define tasks using the ECS RunTask API
Why it's wrong here
RunTask starts a task once; it does not monitor or restart.
- ✗
Use an Auto Scaling group for the Fargate tasks
Why it's wrong here
Auto Scaling groups are not used with Fargate; ECS service auto scaling is used.
- ✓
Create an ECS service with a desired count and task definition
Why this is correct
ECS service maintains desired count and replaces failed tasks.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the RunTask API (for one-off tasks) with ECS services (for long-running, self-healing tasks), or mistakenly think CloudWatch alarms or Auto Scaling groups are needed for task restart logic when the ECS service itself provides this capability.
Detailed technical explanation
How to think about this question
Under the hood, an ECS service uses a deployment controller (e.g., the ECS service scheduler) that continuously reconciles the actual task count with the desired count. When a task fails or stops, the service's event stream triggers a replacement task using the same task definition and network configuration, ensuring minimal downtime. In real-world scenarios, this is critical for stateless microservices where task failures must be transparent to clients, and the service can also integrate with load balancers for health checks.
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.
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
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
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Reliability and Business Continuity — study guide chapter
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
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: Create an ECS service with a desired count and task definition — An ECS service with a desired count and task definition ensures that Fargate tasks are automatically restarted if they fail. The ECS service scheduler monitors the desired count and replaces any stopped or failed tasks to maintain the specified number of running instances, providing built-in resilience without additional infrastructure.
What should I do if I get this SOA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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