The answer is to create a CloudWatch alarm on the Lambda Errors metric that sends an SNS notification. This is the most efficient approach because the Errors metric directly captures all failed invocations, including those caused by timeouts, and a CloudWatch alarm can immediately trigger an SNS topic when the alarm state changes to ALARM, providing real-time notification without any code changes or additional infrastructure. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of monitoring Lambda functions natively through CloudWatch rather than modifying function code or adding custom logging. A common trap is to overcomplicate the solution by suggesting custom metrics or CloudWatch Logs filters, but the direct Errors metric is the simplest and fastest path. Memory tip: think "Errors equals timeouts" — Lambda timeouts always produce an error, so the Errors metric is your single source of truth for immediate notification.
SOA-C02 Monitoring, Logging, and Remediation Practice Question
This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. 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 uses AWS Lambda functions that process data from an Amazon SQS queue. The Lambda function is failing intermittently due to timeouts. The SysOps administrator needs to be notified immediately when the function times out. What is the most efficient way to achieve this?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a CloudWatch alarm on the Lambda Errors metric that sends an SNS notification
Option B is correct because a CloudWatch alarm on the Lambda Errors metric directly monitors function invocations that result in errors, including timeouts. When the alarm state changes to ALARM, it can immediately trigger an SNS notification, providing the fastest and most efficient notification mechanism without requiring code changes or 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.
✗
Modify the Lambda function to catch the timeout exception and log it to CloudWatch Logs
Why it's wrong here
Logging alone does not provide immediate notification.
✓
Create a CloudWatch alarm on the Lambda Errors metric that sends an SNS notification
Why this is correct
A CloudWatch alarm on the Errors metric directly alerts on failures including timeouts.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set up a CloudWatch Logs subscription filter to send error logs to an SNS topic
Why it's wrong here
This can work but is less efficient than a direct metric alarm.
✗
Configure an Amazon SNS topic as a Lambda destination for the function
Why it's wrong here
Lambda Destinations work with asynchronous invocations, but SQS polling uses synchronous invocation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume they can catch a timeout exception inside the function code (Option A) or that Lambda destinations (Option D) are a catch-all for all errors, when in fact they only apply to specific invocation types and do not cover all timeout scenarios.
Detailed technical explanation
How to think about this question
Lambda timeouts are reported as 'Task timed out after X seconds' errors in CloudWatch Logs and increment the Errors metric in CloudWatch. A CloudWatch alarm on the Errors metric with a period of 1 minute and a threshold of >0 can trigger an SNS notification within seconds of the first timeout, making it the most efficient approach. Note that the Lambda function's configured timeout must be less than the SQS visibility timeout to avoid duplicate processing, but this does not affect the alarm setup.
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.
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 CloudWatch alarm on the Lambda Errors metric that sends an SNS notification — Option B is correct because a CloudWatch alarm on the Lambda Errors metric directly monitors function invocations that result in errors, including timeouts. When the alarm state changes to ALARM, it can immediately trigger an SNS notification, providing the fastest and most efficient notification mechanism without requiring code changes or 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.
Are there clue words in this question I should notice?
Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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