- A
Enable CloudWatch Contributor Insights for the Lambda function to automatically detect errors.
Why wrong: Contributor Insights is for analyzing high-cardinality data, not for simple error counting.
- B
Create a metric filter on the log group to count occurrences of 'ERROR' in log streams, then create an alarm based on that metric.
This is the standard approach: define a metric filter to extract error counts from logs, then create an alarm.
- C
Configure the Lambda function to publish custom metrics for errors instead of relying on logs.
Why wrong: While possible, the question asks about using the existing log group; custom metrics would require code changes.
- D
Use CloudWatch Logs Insights to query logs for errors and create an alarm directly from the query results.
Why wrong: CloudWatch Logs Insights does not directly support alarm creation; you need a metric filter.
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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.
Refer to the exhibit. A security engineer wants to monitor a Lambda function for errors and create a CloudWatch alarm when errors exceed a threshold. The engineer notices the log group exists but has no metric filters. What should the engineer do to set up the alarm?
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 metric filter on the log group to count occurrences of 'ERROR' in log streams, then create an alarm based on that metric.
The exhibit shows no metric filters exist. To alarm on errors, the engineer must create a metric filter that parses logs for error patterns and emits a metric, then create an alarm on that metric.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable CloudWatch Contributor Insights for the Lambda function to automatically detect errors.
Why it's wrong here
Contributor Insights is for analyzing high-cardinality data, not for simple error counting.
- ✓
Create a metric filter on the log group to count occurrences of 'ERROR' in log streams, then create an alarm based on that metric.
- ✗
Configure the Lambda function to publish custom metrics for errors instead of relying on logs.
Why it's wrong here
While possible, the question asks about using the existing log group; custom metrics would require code changes.
- ✗
Use CloudWatch Logs Insights to query logs for errors and create an alarm directly from the query results.
Why it's wrong here
CloudWatch Logs Insights does not directly support alarm creation; you need a metric filter.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SCS-C02 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create a metric filter on the log group to count occurrences of 'ERROR' in log streams, then create an alarm based on that metric. — The exhibit shows no metric filters exist. To alarm on errors, the engineer must create a metric filter that parses logs for error patterns and emits a metric, then create an alarm on that metric.
What should I do if I get this SCS-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SCS-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 25, 2026
This SCS-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SCS-C02 exam.
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