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Scripting, Containers and Automation →hardMultiple ChoiceObjective-mapped

CAS-004 Scripting, Containers and Automation Practice Question

This CAS-004 practice question tests your understanding of scripting, containers and automation. 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.

Exhibit

Refer to the exhibit.

```yaml
apiVersion: v1
kind: Pod
metadata:
  name: web-server
spec:
  containers:
  - name: nginx
    image: nginx:latest
    securityContext:
      runAsNonRoot: true
      allowPrivilegeEscalation: false
      readOnlyRootFilesystem: true
    volumeMounts:
    - name: host-volume
      mountPath: /data
  volumes:
  - name: host-volume
    hostPath:
      path: /var/data
      type: Directory
```

A security auditor reviews this Kubernetes pod configuration. Which security vulnerability is most critical?

Question 1hardmultiple choice
Full question →

Exhibit

Refer to the exhibit.

```yaml
apiVersion: v1
kind: Pod
metadata:
  name: web-server
spec:
  containers:
  - name: nginx
    image: nginx:latest
    securityContext:
      runAsNonRoot: true
      allowPrivilegeEscalation: false
      readOnlyRootFilesystem: true
    volumeMounts:
    - name: host-volume
      mountPath: /data
  volumes:
  - name: host-volume
    hostPath:
      path: /var/data
      type: Directory
```

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

✓

The hostPath volume mount provides direct filesystem access to the host, enabling potential container escape.

The pod mounts a hostPath volume, which allows the container to access and potentially modify host filesystem, leading to container escape. Option C is correct. Options A and B are mitigated by the security context. Option D is false.

Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    The container image is from a public registry and should use a private one.

    Why it's wrong here

    Using public images is common but the critical vulnerability is the hostPath mount.

  • ✗

    The container runs as non-root, but root access is required for certain operations.

    Why it's wrong here

    Non-root is a best practice; the configuration correctly sets runAsNonRoot: true.

  • ✗

    The container allows privilege escalation, which should be disabled.

    Why it's wrong here

    allowPrivilegeEscalation is set to false, so escalation is disabled.

  • ✓

    The hostPath volume mount provides direct filesystem access to the host, enabling potential container escape.

    Why this is correct

    HostPath mounts give the container access to the host filesystem; if compromised, the attacker can manipulate host files.

    Related concept

    Authentication checks who the user is.

Common exam traps

Common exam trap: authentication is not authorization

Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.

Detailed technical explanation

How to think about this question

This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.

KKey Concepts to Remember

  • Authentication checks who the user is.
  • Authorization controls what the user is allowed to do after login.
  • Privilege levels affect access to EXEC and configuration commands.
  • AAA, TACACS+ and RADIUS can separate login success from command access.

TExam Day Tips

  • Do not assume successful login means full administrative access.
  • Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
  • Separate login problems from permission problems before choosing the answer.

Key takeaway

Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.

Real-world example

How this comes up in practice

A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.

What to study next

Got this wrong? Here's your next step.

Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CAS-004 questions on access control and AAA configuration.

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FAQ

Questions learners often ask

What does this CAS-004 question test?

Scripting, Containers and Automation — This question tests Scripting, Containers and Automation — Authentication checks who the user is..

What is the correct answer to this question?

The correct answer is: The hostPath volume mount provides direct filesystem access to the host, enabling potential container escape. — The pod mounts a hostPath volume, which allows the container to access and potentially modify host filesystem, leading to container escape. Option C is correct. Options A and B are mitigated by the security context. Option D is false.

What should I do if I get this CAS-004 question wrong?

Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CAS-004 questions on access control and AAA configuration.

What is the key concept behind this question?

Authentication checks who the user is.

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Last reviewed: Jun 24, 2026

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This CAS-004 practice question is part of Courseiva's free CompTIA 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 CAS-004 exam.