EX294 Coordinate rolling updates Practice Question
This EX294 practice question tests your understanding of coordinate rolling updates. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A systems administrator is performing a rolling update of a three-node Red Hat Enterprise Linux 8 cluster running a load-balanced web application. The update involves upgrading the httpd package. The administrator uses Ansible to update one node at a time. After updating the first node, the administrator checks the application health and finds that the node is serving requests correctly. The administrator proceeds to update the second node. However, after the second node update completes, the load balancer reports that both the first and second nodes are unavailable. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The second node's update triggered a configuration change that disabled the health check endpoint on both nodes.
Option C is correct because the update on the second node may have triggered a configuration change (e.g., via a shared config file or package dependency) that also affected the health check endpoint on the first node. Option A is wrong because if the first node were excluded, it would have been unavailable immediately after its update. Option B is wrong because a segmentation fault is unlikely to affect both nodes simultaneously. Option D is wrong because load balancers typically do not limit active nodes to one; they manage pools of multiple nodes.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The httpd service on both nodes experienced a segmentation fault after the update.
Why it's wrong here
A segfault on both nodes at the same time is highly unlikely.
✗
The first node was inadvertently excluded from the load balancer pool by the Ansible playbook.
Why it's wrong here
If excluded, the first node would have been unavailable before the second node update.
✗
The load balancer was configured to only allow one node to be active at a time.
Why it's wrong here
Load balancers are typically configured to allow multiple active nodes.
✓
The second node's update triggered a configuration change that disabled the health check endpoint on both nodes.
Why this is correct
A shared configuration or package dependency could impact both nodes.
Clue confirmation
The clue words "first", "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the EX294 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which EX294 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Coordinate rolling updates — This question tests Coordinate rolling updates — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The second node's update triggered a configuration change that disabled the health check endpoint on both nodes. — Option C is correct because the update on the second node may have triggered a configuration change (e.g., via a shared config file or package dependency) that also affected the health check endpoint on the first node. Option A is wrong because if the first node were excluded, it would have been unavailable immediately after its update. Option B is wrong because a segmentation fault is unlikely to affect both nodes simultaneously. Option D is wrong because load balancers typically do not limit active nodes to one; they manage pools of multiple nodes.
What should I do if I get this EX294 question wrong?
Identify which EX294 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "first", "most likely". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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