ITIL4-CDS Create, Deliver and Support Practice Question
Exhibit
LOG_FILE_OUTPUT: [2023-10-12 14:02:01] ERROR: Service API_Gateway connection timeout after 5000ms. [2023-10-12 14:02:05] WARN: CircuitBreaker state changed to OPEN.
Refer to the exhibit. Based on the logs, what is the most appropriate next action for an IT team following ITIL 4 CDS principles?
⚠ Common exam trap
When seeing a circuit breaker trip, candidates mistakenly suggest restarting the primary application instead of investigating the failing downstream dependency service.
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
✓
Analyze the dependency service's health and connectivity logs to identify the cause.
The circuit breaker has triggered, indicating a failure in the downstream service. The team must proactively investigate the incident using incident management practices and observability data. By identifying the root cause of the API Gateway timeout, they ensure service continuity. This demonstrates the ability to manage service disruptions through effective monitoring and incident response, ensuring that the service remains resilient and customer expectations for availability are consistently met.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Immediately perform a rollback of the last deployment to ensure service restoration.
Why it's wrong here
Rolling back without root cause analysis is premature. The logs indicate a connection timeout, which might be caused by external service outages or network saturation, not necessarily a recent code deployment. Indiscriminate rollbacks can disrupt stable services and lead to unnecessary downtime, violating the principle of informed incident management.
- ✓
Analyze the dependency service's health and connectivity logs to identify the cause.
Why this is correct
Investigating the dependency is the logical next step when a circuit breaker trips. By analyzing the health of the downstream service, the team can distinguish between a local configuration issue and an external failure, allowing for a targeted, efficient resolution that minimizes the impact on overall service availability.
- ✗
Increase the timeout threshold in the configuration to allow for longer processing.
Why it's wrong here
Simply increasing the timeout without diagnosing the cause hides the underlying performance issue. This reactive change may lead to resource exhaustion or degraded user experience as requests hang longer, effectively ignoring the warning signs that the system architecture is not performing as expected under current demand levels.
- ✗
Manually reset the CircuitBreaker state to CLOSED to restore API traffic flow.
Why it's wrong here
Manually overriding a safety mechanism like a circuit breaker is dangerous. If the underlying fault remains, forcing the state to CLOSED will only cause further instability, potentially leading to cascading failures across the service architecture. The circuit breaker should only be closed once the underlying issue is resolved.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official PeopleCert/AXELOS exam blueprint
This ITIL4-CDS practice question is part of Courseiva's free PeopleCert/AXELOS 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 ITIL4-CDS exam.