EX280 Cluster Installation And Management Practice Question
An administrator wants to perform a manual rollback of a MachineConfig change that caused issues on worker nodes. What is the standard way to revert to the previous configuration using the Machine Config Operator?
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
✓
Delete the problematic MachineConfig object, causing the MCO to automatically roll back nodes to the previous configuration.
To rollback a MachineConfig, the administrator can delete the erroneous MachineConfig object, and the MCO will automatically revert the nodes to the previous valid configuration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Reboot each worker node into the previous GRUB menu entry manually via IPMI.
Why it's wrong here
Manual GRUB rollbacks bypass the MCO and can cause state drift; MCO handles rollbacks declaratively via object deletion.
- ✗
Run 'oc rollback machineconfigpool worker'.
Why it's wrong here
MachineConfigPools do not have a rollback subcommand.
- ✗
Run 'oc adm node-rollback --pool=worker'.
Why it's wrong here
The 'oc adm node-rollback' command does not exist.
- ✓
Delete the problematic MachineConfig object, causing the MCO to automatically roll back nodes to the previous configuration.
Why this is correct
Deleting the unwanted MachineConfig causes the MCO to re-render the ignition config and revert nodes.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Red Hat exam blueprint
This EX280 practice question is part of Courseiva's free Red Hat 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 EX280 exam.