Troubleshooting And Diagnostics →hardMultiple ChoiceObjective-mapped

EX280 Troubleshooting And Diagnostics Practice Question

An administrator is troubleshooting a failing MachineConfig update in an OpenShift cluster. The MachineConfigPool 'worker' is degraded and reports that a node is failing to apply the rendered-worker configuration. Which log stream is critical for determining why the Machine Config Daemon failed to update system files on the target node?

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

✓

oc logs -n openshift-machine-config-operator daemonset/machine-config-daemon

The Machine Config Daemon runs as a DaemonSet across all nodes in the openshift-machine-config-operator namespace. Accessing its logs on the affected node via oc logs or oc debug is necessary.

Answer analysis

Option-by-option breakdown

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

✗
oc describe machineconfigpool worker
Why it's wrong here
Describing the pool shows high-level status conditions and node counts, but not the detailed MCD failure script output.
✓
oc logs -n openshift-machine-config-operator daemonset/machine-config-daemon
Why this is correct
The machine-config-daemon DaemonSet pods run on every node and execute the actual file updates and systemd restarts.
✗
oc logs -n openshift-cluster-version-operator deployment/cluster-version-operator
Why it's wrong here
The CVO coordinates cluster upgrades as a whole, but individual node file deployment is handled by the MCO.
✗
journalctl -u kubelet -e
Why it's wrong here
The kubelet manages container lifecycles, not the specific OS-level MachineConfig file applications handled by MCO.

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Written and reviewed by Johnson Ajibi, MSc IT Security

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Last reviewed August 2026 · checked against the official Red Hat exam blueprint

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