Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A SysOps administrator needs to create a custom Amazon CloudWatch metric to track the number of active user sessions from application logs. The administrator wants to publish this metric to CloudWatch and set an alarm when the count exceeds a threshold. Which solution should be used?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Use a CloudWatch Logs Metric Filter on the log group.
A metric filter scans log entries for a pattern and increments a metric each time the pattern appears. The resulting metric can be used to trigger an alarm. This is the correct and straightforward approach.
B
Distractor review
Use CloudWatch Contributor Insights to extract the metric from logs.
Contributor Insights analyzes high contributors (e.g., top IPs) and generates time series, but it does not create a simple count metric that can be alarmed on like a metric filter. It is meant for different use cases.
C
Distractor review
Use CloudWatch Synthetics Canary to simulate user sessions and publish metrics.
Synthetics Canaries are used for end-to-end testing of APIs and websites, not for extracting metrics from existing application logs. They would not be appropriate for this requirement.
D
Distractor review
Use CloudWatch Embedded Metric Format to have the application publish metrics directly.
Embedded Metric Format requires modifying the application code to output structured JSON that CloudWatch automatically turns into metrics. While possible, it is more invasive than using a metric filter on existing logs.
Common exam trap
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.
Technical deep dive
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.
Related practice questions
Related SOA-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A company uses Amazon CloudFront to deliver content to a global audience. The origin is an Application Load Balancer in us-east-1. The SysOps administrator wants to reduce costs by minimizing the number of requests that reach the origin server. Which action should the administrator take?
Question 2
A company runs a batch processing application on Amazon EC2 that runs for 2 hours every night. The workload can tolerate interruptions. Which EC2 purchasing option provides the lowest cost for this use case?
Question 3
A SysOps administrator needs to monitor the CPU utilization of an Amazon RDS DB instance and receive an alarm when CPU utilization exceeds 80% for 5 consecutive minutes. Which AWS service should be used to create this alarm?
Question 4
A company runs a critical web application on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB). The application uses session stickiness (sticky sessions) to maintain user sessions. The SysOps administrator notices that when instances are replaced during a scale-in or failure event, users lose their session data. The administrator needs to preserve session data across instance failures without losing stickiness benefits. What should the administrator do?
Question 5
A company runs a production web application on a single Amazon EC2 instance. The application experiences a predictable and steady workload 24/7. The SysOps administrator wants to minimize compute costs for this instance while ensuring it remains available during the expected workload. Which EC2 purchasing option should the administrator use?
Question 6
A company has a VPC with public and private subnets. The private subnets host application servers that need to make outbound HTTPS connections to the internet. The SysOps administrator must implement a solution that provides outbound internet connectivity while preventing inbound connections from the internet. Additionally, the solution must allow the company to control which domains the application servers can access. Which solution should the administrator implement?
FAQ
Questions learners often ask
What does this SOA-C02 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Use a CloudWatch Logs Metric Filter on the log group. — Amazon CloudWatch Logs Metric Filters can parse log data and convert it into numeric CloudWatch metrics. The administrator can create a metric filter that counts occurrences of a pattern (e.g., 'Session started') and then create an alarm on the resulting metric. Contributor Insights analyzes log data for top contributors, not custom metrics. Synthetics monitors endpoints via canaries. Embedded Metric Format requires code changes to publish metrics directly. Metric filters are the simplest solution for extracting metrics from existing logs.
What should I do if I get this SOA-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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