CLF-C02 Cloud Technology and Services Practice Question
A company's microservices application consists of 10 services. When a user request is slow, the development team cannot determine which service in the chain is the bottleneck. Which AWS service provides distributed tracing so they can see the full path of a request and identify the slow component?
⚠ Common exam trap
Many candidates confuse Amazon CloudWatch Metrics (which shows aggregate performance data) with distributed tracing, not realizing that only X-Ray can trace a single request's full path across multiple services to identify the specific slow component.
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
✓
AWS X-Ray
AWS X-Ray is the correct service because it provides end-to-end distributed tracing, allowing developers to trace a request as it travels through multiple microservices. It generates a service map that shows the full path of a request, including latency breakdowns for each service, enabling identification of the slow component. This directly addresses the need to pinpoint bottlenecks in a chain of 10 services.
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 Metrics
Why it's wrong here
Amazon CloudWatch Metrics stores time-series data points such as CPU utilization, memory usage, and request counts, aggregated across an entire resource or application. It provides graphs and alarms based on statistical aggregates like averages and percentiles, but it never correlates a single end-to-end request across multiple services. Therefore, it can show that a service is slow overall, but it cannot reveal which specific downstream call in a distributed request path is the bottleneck.
- ✗
AWS CloudTrail
Why it's wrong here
AWS CloudTrail is an audit service that logs every AWS API call made by a user, role, or service, capturing details like actor identity, source IP, and timestamp. These event logs are designed for security investigation, compliance, and governance—not for viewing the internal path of an application request as it hops between microservices. Even though CloudTrail can tell you that an API call was made to a Lambda function, it cannot provide a per-service latency breakdown or trace the request context passed between services.
- ✓
AWS X-Ray
Why this is correct
X-Ray instruments applications with the X-Ray SDK to capture trace data for each request. It builds a service map showing latency at each service hop, making it straightforward to identify the bottleneck in a multi-service chain.
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Amazon Inspector
Why it's wrong here
Amazon Inspector is a vulnerability management service that performs automated security assessments by installing an agent on EC2 instances and scanning for network reachability, known CVEs, and deviations from security best practices. It focuses on identifying security weaknesses and compliance issues in the underlying infrastructure, not on application-level request tracing. It does not instrument code to capture trace segments, so it cannot pinpoint which service in a distributed architecture is adding latency.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CLF-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 CLF-C02 exam.