- A
Enable Cost Anomaly Detection with an AWS services monitor and create an alert subscription to email the finance team when an anomaly is detected
Cost Anomaly Detection's ML model learns the historical spending pattern for each service. When EC2 (or any service) starts spending at an anomalous rate, the model detects it within hours. The alert subscription can notify via email or SNS with the anomaly amount, affected service, and percentage deviation. No manual threshold tuning is needed — the model self-calibrates.
- B
Create an AWS Budget with a monthly EC2 cost threshold of $10,000 and an alert at 80 percent of the threshold
Why wrong: A fixed-threshold budget is easy to set up but requires knowing the expected spend in advance. It does not detect anomalous patterns — if normal spend is $9,000 and a runaway group adds $3,000 over the alert period, a $10,000 budget may not trigger if some costs shift to the next period. It also requires separate budgets per service.
- C
Enable AWS Cost Explorer and review the daily cost breakdown each morning to spot unexpected charges
Why wrong: Cost Explorer is a visualization and analysis tool — it requires manual review. The finance team would only discover the spike during their daily review, potentially hours or days after it began. Cost Anomaly Detection sends automatic proactive alerts without requiring manual log-in and review.
- D
Configure CloudWatch Billing alarms with a static threshold for each AWS service individually
Why wrong: CloudWatch Billing alarms use fixed dollar thresholds per account or service. Setting appropriate static thresholds for every service requires knowing the expected spend and updating thresholds as workloads grow. They do not use ML to distinguish normal growth from anomalous spikes.
SOA-C02 Practice Question: AWS Cost Anomaly Detection for automated alerts…
This SOA-C02 practice question tests your understanding of cost and performance optimization. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. A key principle to apply: cost Anomaly Detection. 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.
The finance team was surprised by a $12,000 spike in EC2 costs last month caused by a runaway Auto Scaling group. They want to receive an email alert within hours whenever any AWS service cost behaves unexpectedly, without manually setting fixed dollar thresholds for each service. Which AWS cost management feature provides this?
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
Enable Cost Anomaly Detection with an AWS services monitor and create an alert subscription to email the finance team when an anomaly is detected
Cost Anomaly Detection uses machine learning to model historical spending patterns for each AWS service and automatically detects unusual spikes without requiring manual thresholds. By creating an AWS services monitor and linking an alert subscription, the finance team receives email notifications within hours when any service deviates from its expected cost behavior, directly addressing the need for service-agnostic, threshold-free alerts.
Key principle: Cost Anomaly Detection
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 Cost Anomaly Detection with an AWS services monitor and create an alert subscription to email the finance team when an anomaly is detected
Why this is correct
Cost Anomaly Detection's ML model learns the historical spending pattern for each service. When EC2 (or any service) starts spending at an anomalous rate, the model detects it within hours. The alert subscription can notify via email or SNS with the anomaly amount, affected service, and percentage deviation. No manual threshold tuning is needed — the model self-calibrates.
Related concept
Cost Anomaly Detection
- ✗
Create an AWS Budget with a monthly EC2 cost threshold of $10,000 and an alert at 80 percent of the threshold
Why it's wrong here
A fixed-threshold budget is easy to set up but requires knowing the expected spend in advance. It does not detect anomalous patterns — if normal spend is $9,000 and a runaway group adds $3,000 over the alert period, a $10,000 budget may not trigger if some costs shift to the next period. It also requires separate budgets per service.
- ✗
Enable AWS Cost Explorer and review the daily cost breakdown each morning to spot unexpected charges
Why it's wrong here
Cost Explorer is a visualization and analysis tool — it requires manual review. The finance team would only discover the spike during their daily review, potentially hours or days after it began. Cost Anomaly Detection sends automatic proactive alerts without requiring manual log-in and review.
- ✗
Configure CloudWatch Billing alarms with a static threshold for each AWS service individually
Why it's wrong here
CloudWatch Billing alarms use fixed dollar thresholds per account or service. Setting appropriate static thresholds for every service requires knowing the expected spend and updating thresholds as workloads grow. They do not use ML to distinguish normal growth from anomalous spikes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Budgets or CloudWatch Billing alarms with anomaly detection, but those tools require manual static thresholds and do not automatically adapt to changing spending patterns across multiple services.
Detailed technical explanation
How to think about this question
Cost Anomaly Detection leverages a proprietary machine learning model that analyzes up to 12 months of historical cost and usage data to establish a baseline for each service, then evaluates new usage against that baseline using a statistical anomaly score. The alert subscription integrates with Amazon SNS to deliver notifications via email, SMS, or other endpoints, and the detection granularity is at the service level, meaning a spike in any monitored service triggers an alert without per-service threshold configuration. In practice, this feature can detect anomalies caused by misconfigured resources, such as a runaway Auto Scaling group, within 24 hours of the cost incurrence.
KKey Concepts to Remember
- Cost Anomaly Detection
- Anomaly Monitor
- Alert Subscription
- ML-based Threshold
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
Cost Anomaly Detection
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Review cost Anomaly Detection, then practise related SOA-C02 questions on the same topic to reinforce the concept.
- →
Cost and Performance Optimization — study guide chapter
Learn the concepts, then practise the questions
- →
Cost and Performance Optimization practice questions
Targeted practice on this topic area only
- →
All SOA-C02 questions
1,546 questions across all exam domains
- →
AWS Certified SysOps Administrator Associate SOA-C02 study guide
Full concept coverage aligned to exam objectives
- →
SOA-C02 practice test guide
How to use practice tests most effectively before exam day
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.
Monitoring, Logging, and Remediation practice questions
Practise SOA-C02 questions linked to Monitoring, Logging, and Remediation.
Reliability and Business Continuity practice questions
Practise SOA-C02 questions linked to Reliability and Business Continuity.
Deployment, Provisioning, and Automation practice questions
Practise SOA-C02 questions linked to Deployment, Provisioning, and Automation.
Security and Compliance practice questions
Practise SOA-C02 questions linked to Security and Compliance.
Networking and Content Delivery practice questions
Practise SOA-C02 questions linked to Networking and Content Delivery.
Cost and Performance Optimization practice questions
Practise SOA-C02 questions linked to Cost and Performance Optimization.
SOA-C02 fundamentals practice questions
Practise SOA-C02 questions linked to SOA-C02 fundamentals.
SOA-C02 scenario practice questions
Practise SOA-C02 questions linked to SOA-C02 scenario.
SOA-C02 troubleshooting practice questions
Practise SOA-C02 questions linked to SOA-C02 troubleshooting.
Practice this exam
Start a free SOA-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this SOA-C02 question test?
Cost and Performance Optimization — This question tests Cost and Performance Optimization — Cost Anomaly Detection.
What is the correct answer to this question?
The correct answer is: Enable Cost Anomaly Detection with an AWS services monitor and create an alert subscription to email the finance team when an anomaly is detected — Cost Anomaly Detection uses machine learning to model historical spending patterns for each AWS service and automatically detects unusual spikes without requiring manual thresholds. By creating an AWS services monitor and linking an alert subscription, the finance team receives email notifications within hours when any service deviates from its expected cost behavior, directly addressing the need for service-agnostic, threshold-free alerts.
What should I do if I get this SOA-C02 question wrong?
Review cost Anomaly Detection, then practise related SOA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Cost Anomaly Detection
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More SOA-C02 practice questions
- A company uses an Amazon DynamoDB table with on-demand capacity mode. The table handles a workload with a steady baselin…
- A company uses Amazon CloudWatch Logs to store application logs. The SysOps administrator needs to count the occurrences…
- A SysOps administrator needs to monitor the CPU utilization of an Amazon EC2 instance and send an alert when it exceeds…
- A SysOps administrator needs to monitor the CPU utilization of an Amazon EC2 instance fleet and send an alert when the a…
- A company's security policy requires that all Amazon S3 buckets must have server-side encryption enabled. The SysOps adm…
- A SysOps administrator uses AWS CloudFormation to deploy a stack that includes an Amazon EC2 instance. The administrator…
Last reviewed: Jun 11, 2026
This SOA-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 SOA-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.