Quick Answer
The answer is `kubeadm upgrade plan`. This command is the correct first step after upgrading kubeadm itself because it performs a critical pre-flight check: it validates that the target upgrade path from your current cluster version, such as v1.28.0, to the desired v1.29.0 is supported by kubeadm, and it displays the exact versions available along with any required manual steps or configuration changes. On the Certified Kubernetes Administrator CKA exam, this question tests your understanding of the safe, sequential upgrade workflow for the control plane, where skipping the plan command and jumping directly to `kubeadm upgrade apply` is a common trap that can lead to version mismatches or unsupported upgrades. A frequent memory tip is to think of the plan command as your upgrade roadmap: you never start a journey without checking the map first. Remember the mnemonic "Plan before Apply" to keep the order straight in the exam.
This CKA practice question tests your understanding of cluster architecture, installation and configuration. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
You want to upgrade the control plane from v1.28.0 to v1.29.0 using kubeadm. After upgrading kubeadm on the control plane node, which command should you run first?
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: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
kubeadm upgrade plan
kubeadm upgrade plan checks the feasibility and shows the steps.
kubeadm upgrade apply v1.29.0
Why wrong: This is the command to perform the upgrade, but you should first run 'kubeadm upgrade plan' to verify the upgrade path.
kubeadm upgrade node
Why wrong: This is used for worker nodes, not the initial control plane upgrade.
kubeadm upgrade diff
Why wrong: There is no such command.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
kubeadm upgrade plan
After upgrading kubeadm on the control plane node, the first command to run is `kubeadm upgrade plan`. This command checks the current cluster version, validates that the upgrade path is supported (e.g., from v1.28.0 to v1.29.0), and displays the available versions to upgrade to, along with any manual steps required. It is a prerequisite to ensure the upgrade is safe before proceeding with `kubeadm upgrade apply`.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
kubeadm upgrade plan
Why this is correct
kubeadm upgrade plan checks the feasibility and shows the steps.
Clue confirmation
The clue words "first", "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
kubeadm upgrade apply v1.29.0
Why it's wrong here
This is the command to perform the upgrade, but you should first run 'kubeadm upgrade plan' to verify the upgrade path.
kubeadm upgrade node
Why it's wrong here
This is used for worker nodes, not the initial control plane upgrade.
kubeadm upgrade diff
Why it's wrong here
There is no such command.
Common exam traps
The trap here is that candidates often confuse the sequence and jump directly to `kubeadm upgrade apply`, thinking it is the first step, but the CKA exam tests the prerequisite validation step (`kubeadm upgrade plan`) to ensure a safe upgrade process.
Trap categories for this question
Command / output trap
This is the command to perform the upgrade, but you should first run 'kubeadm upgrade plan' to verify the upgrade path.
Detailed technical explanation
Under the hood, `kubeadm upgrade plan` queries the Kubernetes release API and compares the current cluster's version against the target version, checking for any deprecated APIs or configuration changes that require manual intervention. It also verifies that the upgrade is within the same minor version skew (e.g., 1.28 to 1.29 is allowed, but skipping versions like 1.28 to 1.30 is not). In real-world scenarios, skipping `upgrade plan` can cause the upgrade to fail mid-way due to unsupported API versions or missing migration steps, leaving the cluster in a broken state.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cluster Architecture, Installation and Configuration — study guide chapter
Learn the concepts, then practise the questions
Cluster Architecture, Installation and Configuration practice questions
Targeted practice on this topic area only
All CKA questions
1,005 questions across all exam domains
Certified Kubernetes Administrator CKA study guide
Full concept coverage aligned to exam objectives
CKA practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise CKA questions linked to Cluster Architecture, Installation and Configuration.
Practise CKA questions linked to Services and Networking.
Practise CKA questions linked to Workloads and Scheduling.
Practise CKA questions linked to Storage.
Practise CKA questions linked to Troubleshooting.
Practise CKA questions linked to Cluster Architecture, Installation & Configuration.
Practise CKA questions linked to Workloads & Scheduling.
Practise CKA questions linked to Services & Networking.
Practise CKA questions linked to CKA fundamentals.
Practise CKA questions linked to CKA scenario.
Practise CKA questions linked to CKA troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Cluster Architecture, Installation and Configuration — This question tests Cluster Architecture, Installation and Configuration — Read the scenario before looking for a memorised answer..
The correct answer is: kubeadm upgrade plan — After upgrading kubeadm on the control plane node, the first command to run is `kubeadm upgrade plan`. This command checks the current cluster version, validates that the upgrade path is supported (e.g., from v1.28.0 to v1.29.0), and displays the available versions to upgrade to, along with any manual steps required. It is a prerequisite to ensure the upgrade is safe before proceeding with `kubeadm upgrade apply`.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "first", "which command". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 24, 2026
This CKA practice question is part of Courseiva's free CNCF 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 CKA exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.