Question 1,405 of 418
DOP-C02 Incident and Event Response Practice Question
Exhibit
Refer to the exhibit. CloudWatch Logs Log Group: - Log Group Name: /aws/lambda/my-function - Metric Filter: [timestamp, requestID, statusCode=500, ...] - Metric: ErrorCount - Alarm: AlarmName: HighErrorRate, Statistic: Sum, Period: 300, Threshold: 10, Evaluation Periods: 1 - The alarm triggers when ErrorCount >= 10 in a 5-minute period.
Refer to the exhibit. A DevOps engineer set up a CloudWatch alarm for a Lambda function. The alarm fires when the error count metric exceeds 10 in 5 minutes. The engineer receives an alarm notification, but when checking the Lambda logs, only 3 errors are found in that 5-minute window. What is the MOST likely reason for the discrepancy?
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
✓
The metric filter is counting errors from other log groups or sources that use the same metric name.
The metric filter might be capturing errors from other log groups that share the same metric name (ErrorCount). If multiple Lambda functions or other services publish to the same metric, the alarm could be summing across all of them. Option A is wrong because CloudWatch Logs metric filters are near real-time. Option C is wrong because Lambda errors are counted correctly. Option D is wrong because the metric filter is correctly defined.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The metric filter is not processing logs in real time, causing a delay.
Why it's wrong here
Metric filters process logs in near real-time.
- ✓
The metric filter is counting errors from other log groups or sources that use the same metric name.
Why this is correct
If multiple sources publish to the same metric, the alarm sums them.
- ✗
The metric filter pattern is incorrect and is matching non-error entries.
Why it's wrong here
The pattern is correctly set to statusCode=500.
- ✗
The Lambda function is generating more errors than shown in the logs.
Why it's wrong here
The logs show only 3 errors.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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Last reviewed: Jun 20, 2026
This DOP-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 DOP-C02 exam.
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