- A
Configure the CloudWatch agent to use a persistent buffer on an EBS volume.
Correct. Configuring the CloudWatch agent to use a persistent buffer on an EBS volume ensures log data is not lost during instance termination because the buffer is stored on a durable EBS volume that persists independently of the instance.
- B
Configure an S3 Lifecycle policy to transition logs to S3 Glacier.
Why wrong: Incorrect. S3 Lifecycle policies are used to manage the lifecycle of objects in S3 buckets, but they do not affect the sending or retention of logs in CloudWatch Logs.
- C
Use the CloudWatch agent to send logs directly to Amazon S3.
Why wrong: Incorrect. The CloudWatch agent does not have the ability to send logs directly to Amazon S3. It sends logs to Amazon CloudWatch Logs.
- D
Attach an EBS volume to each instance and store logs there.
Why wrong: Incorrect. Simply attaching an EBS volume to store logs does not provide a mechanism for centralized log collection. The logs would remain on the volume and would not be automatically sent to CloudWatch Logs or any other central location.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 web application on Amazon EC2 instances in an Auto Scaling group across three Availability Zones. The application writes logs to local instance storage. The company wants to centralize log collection and ensure logs are retained even if instances are terminated. The current solution uses Amazon CloudWatch Logs agent, but log streams are frequently missing when instances are replaced. What should the company do to ensure complete log collection?
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
Configure the CloudWatch agent to use a persistent buffer on an EBS volume.
Option A is correct. The CloudWatch agent can be configured with a persistent buffer on an EBS volume. This buffer stores log data temporarily until it is successfully sent to CloudWatch Logs. Even if an EC2 instance is terminated, the buffered logs on the EBS volume are retained and will be sent when the agent is configured to use that volume. This ensures no log data is lost during instance replacement. Option B is incorrect because S3 Lifecycle policies manage object transitions in Amazon S3, not CloudWatch logs. Option C is incorrect because the CloudWatch agent does not send logs directly to S3; it sends to CloudWatch Logs. Option D is incorrect because simply storing logs on an EBS volume without the agent's persistent buffer does not ensure automatic log collection and forwarding; the logs would only reside on the volume and not be centrally collected.
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 the CloudWatch agent to use a persistent buffer on an EBS volume.
Why this is correct
Correct. Configuring the CloudWatch agent to use a persistent buffer on an EBS volume ensures log data is not lost during instance termination because the buffer is stored on a durable EBS volume that persists independently of the instance.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure an S3 Lifecycle policy to transition logs to S3 Glacier.
Why it's wrong here
Incorrect. S3 Lifecycle policies are used to manage the lifecycle of objects in S3 buckets, but they do not affect the sending or retention of logs in CloudWatch Logs.
- ✗
Use the CloudWatch agent to send logs directly to Amazon S3.
Why it's wrong here
Incorrect. The CloudWatch agent does not have the ability to send logs directly to Amazon S3. It sends logs to Amazon CloudWatch Logs.
- ✗
Attach an EBS volume to each instance and store logs there.
Why it's wrong here
Incorrect. Simply attaching an EBS volume to store logs does not provide a mechanism for centralized log collection. The logs would remain on the volume and would not be automatically sent to CloudWatch Logs or any other central location.
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
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.
Identify which SAP-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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Continuous Improvement for Existing Solutions — study guide chapter
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the CloudWatch agent to use a persistent buffer on an EBS volume. — Option A is correct. The CloudWatch agent can be configured with a persistent buffer on an EBS volume. This buffer stores log data temporarily until it is successfully sent to CloudWatch Logs. Even if an EC2 instance is terminated, the buffered logs on the EBS volume are retained and will be sent when the agent is configured to use that volume. This ensures no log data is lost during instance replacement. Option B is incorrect because S3 Lifecycle policies manage object transitions in Amazon S3, not CloudWatch logs. Option C is incorrect because the CloudWatch agent does not send logs directly to S3; it sends to CloudWatch Logs. Option D is incorrect because simply storing logs on an EBS volume without the agent's persistent buffer does not ensure automatic log collection and forwarding; the logs would only reside on the volume and not be centrally collected.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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