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.
Your kubeadm cluster was initialized with default certificates. You need to check the expiration of the API server certificate and renew it if necessary. Which TWO commands are appropriate? (Choose TWO.)
kubeadm certs renew all
Renews all certificates managed by kubeadm.
kubeadm certs check-expiration
Lists all certificates and their expiration dates.
kubectl config view
Why wrong: Shows kubeconfig, not certificate expiration details.
kubeadm upgrade plan
Why wrong: Shows upgrade options, not certificate management.
kubectl cluster-info
Why wrong: Shows cluster info, not certificate expiration.
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 certs renew all
Option A is correct because `kubeadm certs renew all` renews all PKI certificates in the cluster, including the API server certificate, without requiring a full cluster reinitialization. Option B is correct because `kubeadm certs check-expiration` displays the expiration dates of all certificates managed by kubeadm, allowing you to verify the API server certificate's expiry before deciding to renew.
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 certs renew all
Why this is correct
Renews all certificates managed by kubeadm.
Related concept
Read the scenario before looking for a memorised answer.
kubeadm certs check-expiration
Why this is correct
Lists all certificates and their expiration dates.
Related concept
Read the scenario before looking for a memorised answer.
kubectl config view
Why it's wrong here
Shows kubeconfig, not certificate expiration details.
kubeadm upgrade plan
Why it's wrong here
Shows upgrade options, not certificate management.
kubectl cluster-info
Why it's wrong here
Shows cluster info, not certificate expiration.
Common exam traps
The trap here is that candidates confuse `kubeadm certs` subcommands with `kubectl` commands, mistakenly thinking `kubectl config view` or `kubectl cluster-info` can reveal certificate expiration, when in fact only `kubeadm` has direct access to the PKI files on the control plane node.
Trap categories for this question
Command / output trap
Shows kubeconfig, not certificate expiration details.
Detailed technical explanation
The API server certificate is a TLS certificate used for serving HTTPS requests; kubeadm stores it at `/etc/kubernetes/pki/apiserver.crt` with a default validity of one year. The `kubeadm certs check-expiration` command reads the certificate files directly and parses their `NotAfter` field, while `kubeadm certs renew all` regenerates the private key and certificate using the existing CA, updating the kubeconfig files automatically. In real-world scenarios, failing to renew before expiry causes `kubectl` commands to fail with `x509: certificate has expired or is not yet valid` errors, requiring manual recovery.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CKA 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
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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 certs renew all — Option A is correct because `kubeadm certs renew all` renews all PKI certificates in the cluster, including the API server certificate, without requiring a full cluster reinitialization. Option B is correct because `kubeadm certs check-expiration` displays the expiration dates of all certificates managed by kubeadm, allowing you to verify the API server certificate's expiry before deciding to renew.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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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.
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