DOP-C02 Monitoring and Logging Practice Question
A company runs a critical application on an Auto Scaling group of EC2 instances behind an Application Load Balancer (ALB). The DevOps team needs to implement a dashboard that shows real-time request latency, error rates, and the number of healthy hosts. Which AWS service should be used to create this dashboard?
⚠ Common exam trap
It's easy for candidates to confuse Amazon QuickSight with CloudWatch Dashboards, assuming QuickSight is the go-to for any dashboarding need, but QuickSight is for business analytics and not designed for real-time infrastructure monitoring with sub-minute latency metrics.
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
✓
Amazon CloudWatch Dashboards
Amazon CloudWatch Dashboards is the correct choice because it provides real-time monitoring and visualization of metrics such as request latency, error rates, and healthy host counts directly from CloudWatch. These metrics are automatically emitted by the Application Load Balancer (e.g., TargetResponseTime, HTTPCode_ELB_5XX_Count, HealthyHostCount) and can be displayed on a customizable dashboard without additional data transformation or querying.
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 QuickSight
Why it's wrong here
Amazon QuickSight is a business intelligence (BI) service for creating interactive dashboards and performing ad-hoc analysis on data from sources like S3, Redshift, and RDS. However, it is not designed for real-time operational monitoring of live infrastructure metrics such as CPU utilization, latency, or error rates, nor does it natively aggregate CloudWatch metrics for operational alerting. QuickSight focuses on historical analytics and visualization for decision-making, not on streaming operational telemetry with sub-minute granularity, making it unsuitable for an operational dashboard.
- ✗
AWS CloudTrail
Why it's wrong here
AWS CloudTrail records API activity and user actions within your AWS account, providing an audit log of who did what, when, and from which IP. While invaluable for security investigations and compliance, CloudTrail does not capture system-level metrics like CPU, memory, or network throughput, nor does it aggregate performance data from EC2 instances or other services. A real-time operational dashboard requires metric streams, not audit event logs, so CloudTrail is the wrong tool for this use case.
- ✗
AWS Config
Why it's wrong here
AWS Config is a service that assesses, audits, and evaluates the configurations of your AWS resources against desired policies, tracking changes like security group rules or instance types. It provides a configuration history and compliance timeline, but it does not collect performance metrics or operational telemetry such as CPU utilization or request counts. Config answers 'what changed in my infrastructure?' not 'how is my application performing right now?' so it cannot power a live operational dashboard.
- ✓
Amazon CloudWatch Dashboards
Why this is correct
Amazon CloudWatch Dashboards are the native solution for building customizable operational views that aggregate metrics from AWS services, including EC2 auto scaling groups, load balancers, and custom application metrics. They support real-time graphing with automatic refresh, can combine multiple metrics, alarms, and logs into a single pane of glass, and allow cross-account or cross-region aggregation. With built-in integration for Auto Scaling group metrics like average CPU utilization and healthy host counts, CloudWatch Dashboards are the appropriate choice for a critical application's real-time operational monitoring.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.