EX280 Troubleshooting And Diagnostics Practice Question
An administrator notices that a node is marked as 'SchedulingDisabled' (Cordoned). Which command should be executed to allow pods to be scheduled on this node again?
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 adm uncordon <node-name>
oc adm uncordon marks a previously cordoned node as schedulable.
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 adm uncordon <node-name>
Why this is correct
oc adm uncordon re-enables scheduling on the specified node.
- ✗
oc patch node <node-name> --type=json -p='[{"op": "replace", "path": "/spec/unschedulable", "value": false}]'
Why it's wrong here
While patching works, 'oc adm uncordon' is the standard, supported administrator command.
- ✗
oc adm drain <node-name> --undo
Why it's wrong here
Drain evicts pods and cordons the node; there is no --undo flag for drain.
- ✗
oc scale node <node-name> --replicas=1
Why it's wrong here
Nodes cannot be scaled using replicas.
About these practice questions
This EX280 question is part of Courseiva's 509-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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.