CKA YAML Configuration 2

Question 1

Which YAML syntax correctly defines a multi-line string that preserves newlines in a Kubernetes ConfigMap?

Accepted Answer

key: |
  line1
  line2

Answer

The literal block scalar `|` preserves newlines exactly as written, making it ideal for multi-line config values.

Question 2

In a Kubernetes Pod spec, what is the correct YAML field to set an environment variable from a ConfigMap key?

Accepted Answer

env[].valueFrom.configMapKeyRef

Answer

The `env[].valueFrom.configMapKeyRef` field references a specific key from a ConfigMap to inject as an environment variable.

Question 3

What does the `---` separator in a YAML file signify when used in Kubernetes manifests?

Accepted Answer

Separation between multiple Kubernetes resource definitions

Answer

The `---` document separator allows multiple Kubernetes resource objects to be defined in a single YAML file.

Question 4

Which YAML anchor/alias feature is valid in Kubernetes manifests processed by kubectl?

Accepted Answer

Anchors (&) and aliases (*) are supported by kubectl's YAML parser

Answer

kubectl uses a YAML parser that supports anchors (&) and aliases (*), allowing reuse of repeated configuration blocks.

Question 5

A Deployment YAML has `replicas: '3'` (as a string). What will happen when applied?

Accepted Answer

kubectl will reject the manifest with a type validation error

Answer

Kubernetes API validation enforces strict types; `replicas` must be an integer, so a quoted string value will cause a validation error.

(CKA) Certified Kubernetes Associate Practice Test