CKAD Application Design and Build Practice Question
This CKAD practice question tests your understanding of application design and build. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO statements are true about Kubernetes Secrets?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Secret data is base64 encoded in YAML manifests.
Option A is correct because Kubernetes Secrets store data as base64-encoded strings in YAML manifests. This encoding is not encryption; it simply converts binary or non-printable data into an ASCII string format for safe inclusion in YAML. The base64 encoding is a standard practice for representing arbitrary data in Kubernetes resource definitions.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Secret data is base64 encoded in YAML manifests.
Why this is correct
Secret values are base64 encoded, not plaintext.
Related concept
Read the scenario before looking for a memorised answer.
✗
Secrets cannot be used as environment variables.
Why it's wrong here
Secrets can be exposed as environment variables via envFrom or valueFrom.
✗
Secrets are always encrypted at rest by default.
Why it's wrong here
Not encrypted by default; requires encryption configuration.
✓
Secrets can be mounted as volumes in a Pod.
Why this is correct
Secrets can be mounted as files using volumes.
Related concept
Read the scenario before looking for a memorised answer.
✗
Secrets are limited to 1KB in size.
Why it's wrong here
Secret size limit is 1MB.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse base64 encoding with encryption, assuming it provides security, or they mistakenly believe Secrets are encrypted at rest by default, when in fact they are stored in plaintext in etcd unless explicitly configured otherwise.
Detailed technical explanation
How to think about this question
Under the hood, Secret data is stored in etcd as base64-encoded plaintext unless encryption at rest is explicitly configured. The base64 encoding is not a security measure—it is a format requirement for YAML. In real-world scenarios, relying solely on base64 encoding for sensitive data (e.g., database passwords) is a security risk; instead, use external secret management tools like HashiCorp Vault or enable encryption at rest with a KMS provider. The 1MB limit per Secret object is enforced by etcd's default maximum request size, not by Kubernetes itself.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CKAD exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKAD question in full detail.
Application Design and Build — This question tests Application Design and Build — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Secret data is base64 encoded in YAML manifests. — Option A is correct because Kubernetes Secrets store data as base64-encoded strings in YAML manifests. This encoding is not encryption; it simply converts binary or non-printable data into an ASCII string format for safe inclusion in YAML. The base64 encoding is a standard practice for representing arbitrary data in Kubernetes resource definitions.
What should I do if I get this CKAD question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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