Consul 1.15 Service Discovery Practice Question
You need to ensure that a service is only discoverable via DNS if it passes its health checks. Which configuration setting in the service definition achieves 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
✓
Set the 'passing' parameter to true in the DNS query.
Consul allows filtering services based on health checks via the 'passing' parameter in the DNS interface or by defining the service with a health check.
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 'only_passing' in the DNS configuration.
Why it's wrong here
This setting does not exist in Consul DNS configuration.
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Disable the agent's 'allow_stale' read setting.
Why it's wrong here
Allow_stale affects consistency, not health check filtering.
- ✓
Set the 'passing' parameter to true in the DNS query.
Why this is correct
Using the passing query parameter filters results to only include services with passing health checks.
- ✗
Set 'deregister_critical_service_after' to 0.
Why it's wrong here
This setting controls service cleanup, not DNS visibility.
About these practice questions
This Consul 1.15 question is part of Courseiva's 194-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official HashiCorp exam blueprint
This Consul 1.15 practice question is part of Courseiva's free HashiCorp 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 Consul 1.15 exam.