EX280 Cluster Installation And Management Practice Question
An administrator is setting up a new custom MachineConfigPool for GPU-enabled worker nodes. After creating the MachineConfigPool resource, the administrator creates a MachineConfig that should apply exclusively to these nodes. What must the administrator include in the MachineConfig to ensure it only applies to the GPU pool?
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
✓
Labels matching the machineconfigpool selector (e.g., 'pools.operator.machineconfiguration.openshift.io/gpu-worker: ""').
MachineConfigs must include node role labels matching the MachineConfigPool (e.g., pools.operator.machineconfiguration.openshift.io/<pool-name>: '') so the MCO targets the correct nodes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Labels matching the machineconfigpool selector (e.g., 'pools.operator.machineconfiguration.openshift.io/gpu-worker: ""').
Why this is correct
MachineConfig objects require matching labels to be associated with custom MachineConfigPools.
- ✗
Placing the MachineConfig object directly inside the GPU namespace.
Why it's wrong here
MachineConfigs are cluster-scoped resources, not namespaced.
- ✗
A field in the spec named 'targetPool: gpu-worker'.
Why it's wrong here
There is no 'targetPool' field in MachineConfig specs.
- ✗
An annotation specifying 'machineconfigpool.openshift.io/target: gpu-worker'.
Why it's wrong here
Targeting is performed via labels defined in the pool's nodeSelector, not annotations.
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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.