Docker DCA Exam - Topic 4 Question 120 Discussion

Actual exam question for Docker's DCA exam

Question #: 120
Topic #: 4

In Kubernetes, to mount external storage to a filesystem path in a container within a pod, you would use a volume in the pod specification. This volume is populated with a persistentVolumeClaim that is bound to an existing persistentVolume. The persistentVolume is defined and managed by the storageClass which provides dynamic or static provisioning of the volume and determines what type of storage will be provided1. Reference:

*Dynamic Volume Provisioning | Kubernetes

Is this a supported user authentication method for Universal Control Plane?

Solution: Docker ID

AYes

BNo

Show Suggested Answer

Suggested Answer: B

Docker Universal Control Plane (UCP) has its own built-in authentication mechanism and integrates with LDAP services1.It also has role-based access control (RBAC), so that you can control who can access and make changes to your cluster and applications1.However, there is no mention of Docker ID being a supported user authentication method for UCP in the resources provided1234.

by Micaela at Jan 05, 2026, 05:16 AM

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Diane

25 days ago

I believe it’s A) Yes. It’s a common method.

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Clay

1 month ago

I’m not so sure. Could be B) No.

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Ling

1 month ago

I feel the same. It makes sense for authentication.

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Kerrie

1 month ago

I think it's A) Yes. Docker ID is widely used.

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My

2 months ago

Wait, really? I didn't know that!

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Yong

2 months ago

Not sure about that, seems too simple.

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Ranee

2 months ago

Definitely a yes from me!

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Edelmira

2 months ago

I thought it was only for Docker Hub.

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Juliann

2 months ago

Yes, Docker ID is a supported method!

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Desiree

2 months ago

I'm pretty sure the correct answer is B) No, since the question is not about Kubernetes volumes.

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Laurene

3 months ago

Haha, this is like asking about apples when the question is about oranges. Totally off-base!

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Daniela

3 months ago

The solution "Docker ID" doesn't seem to match the question. I think there's a mistake here.

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Sage

3 months ago

This question is not about Kubernetes, it's about authentication methods for Universal Control Plane. I'm confused.

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Willow

4 months ago

I think the answer is A) Yes, but I remember there being some limitations in certain environments.

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Kristin

4 months ago

I feel like I saw something about Docker ID in the documentation, but I might be mixing it up with another authentication method.

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Nan

4 months ago

I remember practicing a question about user authentication methods, and Docker ID seemed to be mentioned, but I can't recall if it was specifically for Universal Control Plane.

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Sylvie

4 months ago

I think Docker ID is a valid authentication method, but I'm not completely sure if it's universally supported across all setups.

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Catalina

4 months ago

Ah, I see what's going on now. The prompt is just providing some background information, but the actual question is about whether Docker ID is a supported authentication method for Universal Control Plane. I think I can use my knowledge of authentication methods to answer this.

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Shawnda

4 months ago

I'm a bit lost here. The information about Kubernetes and volumes doesn't seem to have anything to do with the actual question being asked. I'll need to try to separate the relevant information from the irrelevant details to figure out how to approach this.

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Nelida

5 months ago

Okay, let me think this through. The question is asking if Docker ID is a supported user authentication method for Universal Control Plane. Since the prompt doesn't mention anything about Docker ID or Universal Control Plane, I'll need to rely on my general knowledge to answer this. I'll give it my best shot.

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Ronna

5 months ago

Hmm, I'm not sure how to approach this. The information about Kubernetes and volumes doesn't seem relevant to the actual question being asked. I'll need to re-read the prompt carefully to try to understand what they're looking for.

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Joana

5 months ago

This question seems a bit confusing. The prompt talks about Kubernetes and volumes, but then asks about user authentication for Universal Control Plane. I'm not sure how those topics are related.

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Izetta

15 days ago

Right? It feels like two different topics mixed together.

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Geoffrey

20 days ago

I agree, the connection between Kubernetes and user authentication is unclear.

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