Docker DCA Exam - Topic 6 Question 6 Discussion

Actual exam question for Docker's DCA exam

Question #: 6
Topic #: 6

Two pods bear the same label, app: dev.

Will a label selector matching app: dev match both of these pods?

AYes, as long as all the containers in those pods are passing their livenessProbes and readinessProbes.

BYes, if both pods were pre-existing when the label selector was declared.

CYes, if the pods are in the same Kubernetes namespace as the object bearing the label selector

DYes, if the pods are in the same Kubernetes namespace as the object bearing the label selector and both pods were preexisting when the label selector was declared.

Show Suggested Answer

Suggested Answer: D

by Iluminada at May 09, 2022, 07:20 PM

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Ryan

7 months ago

So if they have the same label, they match, right?

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Gearldine

7 months ago

I think it’s more about the pods being there first.

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Louvenia

7 months ago

Wait, does the namespace really matter?

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Janet

7 months ago

Totally agree, it's all about the labels!

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Hoa

8 months ago

Yes, label selectors match based on labels, not pod status.

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Madelyn

8 months ago

I’m a bit confused about the readiness and liveness probes. Do they really affect whether the selector matches? I’m not sure about option A.

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Amina

8 months ago

I practiced a similar question, and I think the key is that both pods need to exist when the selector is declared, which makes me consider option D.

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Joaquin

8 months ago

I remember something about namespaces being important, but I’m not sure if that applies here. Maybe option C?

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Malinda

8 months ago

I think the label selector will match both pods regardless of their state, so I’m leaning towards option A.

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Tiara

8 months ago

Hmm, I'm not too sure about this one. I'll need to think it through a bit more. Maybe I should review the material on row-level security in Analytics.

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Penney

8 months ago

Hmm, I'm a bit unsure about this one. I know queues, semaphores, and notifiers are all used for inter-process communication, but I can't remember if local variables fall into that category.

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