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Monitoring, Logging, and Remediation →mediumMultiple ChoiceObjective-mapped

SOA-C02 Monitoring, Logging, and Remediation Practice Question

This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 uses Amazon CloudWatch Logs to store application logs. The security team needs to be alerted when any log group contains a specific error pattern. The solution must minimize latency and operational overhead. What should a SysOps administrator do?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

Question 1mediummultiple choice

Read the full NAT/PAT explanation →

A
Stream the logs to Amazon Kinesis Data Firehose, which then triggers a Lambda function to check for errors.
Why wrong: Kinesis Data Firehose adds unnecessary complexity and latency for this use case.
B
Create a CloudWatch metric filter on the log group and set an alarm that triggers an SNS notification.
Why wrong: Metric filters can be used, but they may not handle complex pattern matching as easily as Lambda.
C
Create a Lambda function subscribed to the CloudWatch Logs log group, which checks for the error pattern and publishes to an SNS topic.
Lambda subscription provides real-time processing and can apply custom logic to detect patterns.
D
Use CloudWatch Logs Insights to run a query every minute and send results via SNS.
Why wrong: CloudWatch Logs Insights is not real-time and requires manual querying; not suitable for automated alerting.

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 Lambda function subscribed to the CloudWatch Logs log group, which checks for the error pattern and publishes to an SNS topic.

Option C is correct because subscribing a Lambda function directly to a CloudWatch Logs log group allows real-time, low-latency processing of log events as they arrive. The Lambda function can parse each log event for the specific error pattern and publish to an SNS topic to alert the security team, minimizing operational overhead by avoiding additional streaming or polling services.

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.

✗
Stream the logs to Amazon Kinesis Data Firehose, which then triggers a Lambda function to check for errors.
Why it's wrong here
Kinesis Data Firehose adds unnecessary complexity and latency for this use case.
✗
Create a CloudWatch metric filter on the log group and set an alarm that triggers an SNS notification.
Why it's wrong here
Metric filters can be used, but they may not handle complex pattern matching as easily as Lambda.
✓
Create a Lambda function subscribed to the CloudWatch Logs log group, which checks for the error pattern and publishes to an SNS topic.
Why this is correct
Lambda subscription provides real-time processing and can apply custom logic to detect patterns.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use CloudWatch Logs Insights to run a query every minute and send results via SNS.
Why it's wrong here
CloudWatch Logs Insights is not real-time and requires manual querying; not suitable for automated alerting.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates may choose Option B (metric filter and alarm) because it seems simpler, but they overlook that metric filters only count occurrences over time and cannot trigger immediate, per-event alerts, which is required for minimizing latency in security alerting.

Detailed technical explanation

How to think about this question

CloudWatch Logs subscription filters deliver log events in near real-time to Lambda via a push model, with each invocation receiving a batch of logs (up to 6 MB or 10,000 events). The Lambda function can use regex or string matching to detect the error pattern and publish to SNS, ensuring alerts are sent within seconds of the log entry. This approach avoids the polling overhead of Logs Insights or the buffering delay of Kinesis Data Firehose, which typically batches data for 60 seconds or 1 MB before delivery.

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.

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FAQ

Questions learners often ask

What does this SOA-C02 question test?

Monitoring, Logging, and Remediation — This question tests Monitoring, Logging, and Remediation — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Create a Lambda function subscribed to the CloudWatch Logs log group, which checks for the error pattern and publishes to an SNS topic. — Option C is correct because subscribing a Lambda function directly to a CloudWatch Logs log group allows real-time, low-latency processing of log events as they arrive. The Lambda function can parse each log event for the specific error pattern and publish to an SNS topic to alert the security team, minimizing operational overhead by avoiding additional streaming or polling services.

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.

Are there clue words in this question I should notice?

Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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