The correct choice is to set automountServiceAccountToken to false in the pod spec. This security best practice directly addresses the risk of token theft by preventing Kubernetes from automatically mounting the service account token into every container within the pod, thereby eliminating an unnecessary attack surface. On the CompTIA SecurityX CAS-004 exam, this concept tests your understanding of pod-level security controls and the principle of least privilege in container environments—a common trap is confusing disabling the service account entirely with disabling its automatic mounting, but the latter preserves explicit token access when needed while blocking silent exposure. Remember the mnemonic "No Auto, No Theft" to recall that turning off automatic mounting is the targeted fix for token theft scenarios.
CAS-004 Scripting, Containers and Automation Practice Question
This CAS-004 practice question tests your understanding of scripting, containers and automation. 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.
Exhibit
# kubectl describe pod my-app-pod
Name: my-app-pod
Namespace: default
Node: worker-node-1/192.168.1.10
Start Time: Tue, 15 Aug 2023 14:30:00 UTC
Labels: app=my-app
Annotations: none
Status: Running
Containers:
my-app-container:
Container ID: docker://abc123
Image: myregistry.com/my-app:v1.0
Image ID: docker-pullable://myregistry.com/my-app@sha256:xyz
Port: 8080/TCP
Host Port: 0/TCP
State: Running
Started: Tue, 15 Aug 2023 14:30:05 UTC
Ready: True
Restart Count: 0
Environment:
DB_PASSWORD: <set to the key 'db-password' in secret 'db-secret'> Optional: false
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-abc (ro)
Refer to the exhibit. A security analyst notices that the pod is running with a service account token mounted. Which security best practice should be implemented to reduce the risk of token theft in container environments?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set automountServiceAccountToken to false in the pod spec.
Option B is correct because setting automountServiceAccountToken to false in the pod spec prevents the automatic mounting of the service account token, reducing the risk of theft. Option A is incorrect because disabling the entire service account may break functionality if the pod needs API access; the goal is to prevent token exposure while still allowing explicit token mounting if necessary. Option C is incorrect because changing the container runtime does not address token mounting. Option D is incorrect because storing the token in a secret and mounting it increases exposure rather than reducing it.
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.
✗
Store the token in a Kubernetes secret and mount it.
Why it's wrong here
Mounting tokens as secrets increases exposure and is not a security best practice.
✗
Use a different container runtime.
Why it's wrong here
The container runtime does not affect service account token mounting.
✗
Disable the service account for the pod.
Why it's wrong here
Disabling the service account is too restrictive and may break pod functionality that requires API access.
✓
Set automountServiceAccountToken to false in the pod spec.
Why this is correct
This prevents automatic mounting of the token, reducing theft risk while allowing explicit mounting if needed.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 CAS-004 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.
What to study next
Got this wrong? Here's your next step.
Identify which CAS-004 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Scripting, Containers and Automation — This question tests Scripting, Containers and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set automountServiceAccountToken to false in the pod spec. — Option B is correct because setting automountServiceAccountToken to false in the pod spec prevents the automatic mounting of the service account token, reducing the risk of theft. Option A is incorrect because disabling the entire service account may break functionality if the pod needs API access; the goal is to prevent token exposure while still allowing explicit token mounting if necessary. Option C is incorrect because changing the container runtime does not address token mounting. Option D is incorrect because storing the token in a secret and mounting it increases exposure rather than reducing it.
What should I do if I get this CAS-004 question wrong?
Identify which CAS-004 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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