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Linux Foundation PCA Exam - Topic 2 Question 6 Discussion

Actual exam question for Linux Foundation's PCA exam
Question #: 6
Topic #: 2
[All PCA Questions]

What is the name of the official *nix OS kernel metrics exporter?

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Suggested Answer: B

The official Prometheus exporter for collecting system-level and kernel-related metrics from Linux and other UNIX-like operating systems is the Node Exporter.

The Node Exporter exposes hardware and OS metrics including CPU load, memory usage, disk I/O, network traffic, and kernel statistics. It is designed to provide host-level observability and serves data at the default endpoint :9100/metrics in the standard Prometheus exposition text format.

This exporter is part of the official Prometheus ecosystem and is widely deployed for infrastructure monitoring. None of the other listed options (Prometheus_exporter, metrics_exporter, or os_exporter) are official components of the Prometheus project.


Verified from Prometheus documentation -- Node Exporter Overview, System Metrics Collection, and Official Exporters List.

by Carry at Nov 24, 2025, 01:54 AM

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Arthur
9 hours ago
Yeah, node_exporter sounds right. It’s popular.
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Louisa
5 days ago
Wait, are you all sure about this? Sounds off to me.
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Latia
24 days ago
I agree, node_exporter is the right one!
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Lorrie
29 days ago
No way, it's metrics_exporter for sure.
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Jose
1 month ago
I thought it was os_exporter?
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Stephane
1 month ago
It's definitely the node_exporter!
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Derick
1 month ago
Metrics_exporter? Sounds like a fancy name for a bathroom scale.
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Justine
2 months ago
I thought it was called the "os_explorer" - guess I've been living under a rock.
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Janessa
2 months ago
Prometheus_exporter? More like Prometheus_confuser!
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Rikki
2 months ago
I remember studying about metrics exporters, and node_exporter sounds familiar, but I can't shake off the feeling that there might be another one.
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Tammara
2 months ago
I’m a bit confused. I thought there was something called os_exporter, but I can't recall if that's the right one.
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Emmett
2 months ago
Ah, I remember learning about this in class. The official *nix OS kernel metrics exporter is definitely node_exporter. I'm feeling good about this one.
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Marta
3 months ago
I think node_exporter sounds like the most likely answer, but I'm not 100% confident. I'll make an educated guess and move on to the next question.
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Natalie
3 months ago
Okay, I'm pretty sure the official exporter is called node_exporter, but I'll double-check my notes just to be sure.
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Germaine
3 months ago
I feel like I've seen something similar in practice questions, and I think it was definitely not A) Prometheus_exporter.
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An
3 months ago
I think the answer might be B) node_exporter, but I'm not entirely sure. I remember it being related to Prometheus.
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Ollie
4 months ago
B) node_exporter is the correct answer.
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Xochitl
4 months ago
I think it's B) node_exporter.
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Melvin
4 months ago
I'm not too familiar with the different *nix OS kernel metric exporters, so I'll need to try to eliminate the options that don't sound quite right.
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Corazon
4 months ago
Hmm, this one seems tricky. I'll need to think carefully about the *nix OS kernel metrics and which exporter would be the official one.
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Han
3 months ago
I think it's B) node_exporter.
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