EX280 Cluster Installation And Management Practice Question
An administrator has added a new custom worker MachineConfigPool and wants existing worker nodes to be migrated into this new pool based on specific labels. How does an administrator move a node from the default worker pool to a custom MachineConfigPool?
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
✓
Apply the corresponding role label to the node (e.g., 'oc label node worker-01 node-role.kubernetes.io/custom-worker='').
To move a node to a custom MachineConfigPool, the administrator must label the node with the role label matching the custom MachineConfigPool (e.g., node-role.kubernetes.io/<pool-name>='').
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Modify the cluster-wide node migration ConfigMap.
Why it's wrong here
There is no cluster-wide node migration ConfigMap; label assignment handles pool membership.
- ✓
Apply the corresponding role label to the node (e.g., 'oc label node worker-01 node-role.kubernetes.io/custom-worker='').
Why this is correct
MachineConfigPools select nodes based on matching node role labels.
- ✗
Edit the MachineSet to change its target pool name.
Why it's wrong here
MachineSets provision machines, but node assignment to MachineConfigPools is driven by node labels.
- ✗
Run 'oc adm migrate node worker-01 --to-pool=custom-worker'.
Why it's wrong here
The 'oc adm migrate' command does not exist.
About these practice questions
Courseiva writes every EX280 question from scratch — 509 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.