CKAD ConfigMap volume mount Practice Question
Which TWO of the following are valid ways to consume a ConfigMap in a pod? (Select 2)
⚠ Common exam trap
Candidates often confuse configMapRef (used in envFrom, which is a valid method) with configMapKeyRef (used in env.valueFrom). They may also mistakenly believe that envFrom is not a valid method for ConfigMaps.
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
✓
Mounting the ConfigMap as a volume
Although the question instructs to select two, all three options A, B, and E are actually valid ways to consume a ConfigMap in a pod. Option A is correct because a ConfigMap can be mounted as a volume, making each key a file in the container's filesystem. Option B is correct because `configMapKeyRef` in `env.valueFrom` allows loading a specific key from a ConfigMap as an environment variable. Option E is correct because `envFrom` with `configMapRef` loads all keys from a ConfigMap as environment variables. Options C and D are incorrect: `configMapRef` in `env.valueFrom` is not a valid construct (the correct syntax is `configMapKeyRef`), and `secretKeyRef` is used for Secrets, not ConfigMaps.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Mounting the ConfigMap as a volume
Why this is correct
Correct. Mounting a ConfigMap as a volume makes its data available as files.
- ✓
Using configMapKeyRef in env.valueFrom
Why this is correct
Correct. Using `configMapKeyRef` in `env.valueFrom` injects a specific key as an environment variable.
- ✗
Using configMapRef in env.valueFrom
Why it's wrong here
Incorrect. `configMapRef` is not used in `env.valueFrom`; the correct field is `configMapKeyRef`.
- ✗
Using secretKeyRef in env.valueFrom
Why it's wrong here
Incorrect. `secretKeyRef` is used for Secrets, not ConfigMaps.
- ✓
Using envFrom with configMapRef
Why this is correct
Correct: Using envFrom with configMapRef is a valid way to inject all keys from a ConfigMap as environment variables.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CKAD practice question is part of Courseiva's free CNCF 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 CKAD exam.