This AZ-204 practice question tests your understanding of develop azure compute solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
You are deploying a containerized application using Azure Kubernetes Service (AKS). You need to ensure that sensitive configuration data, such as API keys, is not stored in container images. Which Kubernetes resource should you use?
Deployment
Why wrong: Deployment defines the desired state, not for secrets.
ConfigMap
Why wrong: ConfigMap is for non-sensitive data.
PersistentVolume
Why wrong: PersistentVolume is for storage.
Secret
Secrets store sensitive data.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Secret
Option D is correct because Kubernetes Secrets are specifically designed to store sensitive data like API keys, connection strings, and passwords. They are stored in etcd as base64-encoded values (and can be encrypted at rest) and are injected into pods as environment variables or mounted as volumes, ensuring the sensitive data never resides in the container image.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Deployment
Why it's wrong here
Deployment defines the desired state, not for secrets.
ConfigMap
Why it's wrong here
ConfigMap is for non-sensitive data.
PersistentVolume
Why it's wrong here
PersistentVolume is for storage.
Secret
Why this is correct
Secrets store sensitive data.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse ConfigMaps with Secrets, assuming both are interchangeable for configuration, but ConfigMaps store data in plain text and are not secure for sensitive information, while Secrets provide base64 encoding and optional encryption for sensitive data.
Detailed technical explanation
Kubernetes Secrets are stored in etcd as base64-encoded strings, but by default they are not encrypted at rest unless you enable encryption at rest for etcd (e.g., using a KMS provider). When a Secret is mounted as a volume, it creates a tmpfs (in-memory filesystem) to avoid writing sensitive data to disk, and the data is only accessible to the pod via the mount path. In production, you should also use external secrets management tools like Azure Key Vault with the Secrets Store CSI driver to avoid storing raw secrets in etcd altogether.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
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FAQ
Develop Azure compute solutions — This question tests Develop Azure compute solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Secret — Option D is correct because Kubernetes Secrets are specifically designed to store sensitive data like API keys, connection strings, and passwords. They are stored in etcd as base64-encoded values (and can be encrypted at rest) and are injected into pods as environment variables or mounted as volumes, ensuring the sensitive data never resides in the container image.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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