The correct answer is Amazon CloudWatch Logs and CloudWatch Alarms with Amazon SNS. This combination works because CloudWatch Logs captures every Lambda execution log, including timeout errors and stack traces, while CloudWatch Alarms monitor metrics like Errors or Duration and trigger an SNS notification the moment a failure threshold is breached. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your ability to distinguish between services that handle runtime monitoring versus governance or streaming—a common trap is confusing CloudTrail (which logs API calls, not function execution) or Kinesis Data Firehose (designed for batch data loading, not real-time alerting) with CloudWatch’s native monitoring capabilities. To monitor Lambda failures with CloudWatch, remember that Lambda automatically sends logs to CloudWatch Logs, and alarms on the Errors metric provide immediate alerting via SNS. Memory tip: “Logs for the code, Alarms for the load”—CloudWatch Logs captures the code’s output, while Alarms watch the load of failures.
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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 security engineer is designing a monitoring solution for an AWS Lambda function that processes sensitive data. The function occasionally fails due to timeouts. The engineer needs to be alerted immediately when the function fails and also wants to analyze the error logs. Which combination of services should the engineer use?
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
✓
Amazon CloudWatch Logs and CloudWatch Alarms with Amazon SNS
Option D is correct because CloudWatch Logs captures Lambda execution logs, and CloudWatch Alarms can trigger SNS notifications based on metrics like errors. Option A is incorrect because CloudTrail records API calls, not function execution logs. Option B is incorrect because Config tracks resource configuration changes, not runtime errors. Option C is incorrect because Kinesis Data Firehose is for data streaming, not real-time alerting.
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.
✗
Amazon CloudWatch Logs and Amazon Kinesis Data Firehose
Why it's wrong here
Kinesis Firehose delivers data to destinations but does not provide immediate alerting.
✓
Amazon CloudWatch Logs and CloudWatch Alarms with Amazon SNS
Why this is correct
CloudWatch Logs stores logs, and CloudWatch Alarms trigger SNS notifications on errors.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
AWS CloudTrail and Amazon SNS
Why it's wrong here
CloudTrail logs API calls, not function execution details.
✗
AWS Config and Amazon SNS
Why it's wrong here
Config tracks configuration changes, not runtime errors.
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.
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: Amazon CloudWatch Logs and CloudWatch Alarms with Amazon SNS — Option D is correct because CloudWatch Logs captures Lambda execution logs, and CloudWatch Alarms can trigger SNS notifications based on metrics like errors. Option A is incorrect because CloudTrail records API calls, not function execution logs. Option B is incorrect because Config tracks resource configuration changes, not runtime errors. Option C is incorrect because Kinesis Data Firehose is for data streaming, not real-time alerting.
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.
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?
Static NAT maps one inside address to one outside address.
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