CNCFCloud Native Application Delivery

Helm & Chart Structure — KCNA Practice Question

A representative Kubernetes and Cloud Native Associate (KCNA) exam question on Helm & Chart Structure. Work through it below, then read why each option is right or wrong.

This question is part of the free Kubernetes and Cloud Native Associate practice test.

Short answer

The correct answer is B. values.yaml, which holds default values that templates read through .Values and that user-supplied values override.

The Question

Which part of a Helm chart supplies the default configuration values that the templates read, and that a user can override when installing?

AChart.yaml, which holds the chart name and version plus the default values that templates read through .Values

Bvalues.yaml, which holds default values that templates read through .Values and that user-supplied values overrideCorrect

CThe charts/ directory, which holds the default values files that templates read through .Values for each environment

DThe templates/ directory, which holds the default values as plain YAML that Helm applies without any rendering step

Why B is correct

Why the other options are wrong

Option A: Chart.yaml, which holds the chart name and version plus the default values that templates read through .Values

Option A does not satisfy the requirement in the scenario. Review the explanation above: the correct choice (B) is the only one that fully meets every constraint stated in the question.

Option C: The charts/ directory, which holds the default values files that templates read through .Values for each environment

Option C does not satisfy the requirement in the scenario. Review the explanation above: the correct choice (B) is the only one that fully meets every constraint stated in the question.

Option D: The templates/ directory, which holds the default values as plain YAML that Helm applies without any rendering step

Option D does not satisfy the requirement in the scenario. Review the explanation above: the correct choice (B) is the only one that fully meets every constraint stated in the question.

Key idea: Helm & Chart Structure

B is correct: values.yaml supplies the defaults, and values given by the user override them. A is wrong because Chart.yaml is the chart's metadata file, not the place for default values. C is wrong because charts/ holds dependent charts, not value files. D is wrong because templates/ holds templates that Helm combines with values to generate Kubernetes manifests. On the KCNA exam, questions in the "Cloud Native Application Delivery" domain test whether you can map a scenario's constraints to the right choice. Read the requirement carefully, eliminate options that violate any single constraint, and pick the one that satisfies all of them with the least operational overhead.

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helm.shTopics: Charts