CKA Practice Question: Cluster Architecture, Installation & Configuration
This CKA practice question tests your understanding of cluster architecture, installation & configuration. 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.
Which TWO of the following are valid methods to configure the kubelet's node IP address?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Setting the --node-ip flag in kubelet command line.
Option B is correct because the `--node-ip` flag explicitly sets the IP address that the kubelet uses to identify itself to the API server and other components. This flag directly configures the node's primary IP for kubelet-to-apiserver communication and is a standard method in both standalone kubelet and kubeadm-deployed clusters.
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.
✗
Using the --hostname-override flag.
Why it's wrong here
This overrides the hostname, not the IP.
✓
Setting the --node-ip flag in kubelet command line.
Why this is correct
This flag directly sets the node IP.
Related concept
Read the scenario before looking for a memorised answer.
✗
Setting the --address flag in kubelet command line.
Why it's wrong here
--address is deprecated and used for binding address, not node IP.
✗
Setting the node-ip in the kubeadm-config ConfigMap.
Why it's wrong here
kubeadm config is for cluster initialization, not kubelet runtime configuration.
✓
Configuring nodeIP in the kubelet configuration file (KubeletConfiguration).
Why this is correct
The KubeletConfiguration object has a nodeIP field.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing the kubelet's listening address (`--address`) with the node IP used for cluster registration (`--node-ip`), leading candidates to select the deprecated `--address` flag instead of the correct `--node-ip` or `KubeletConfiguration.nodeIP`.
Detailed technical explanation
How to think about this question
The kubelet uses the node IP to register the node with the API server and to advertise its address for pod-to-node traffic. When `--node-ip` is not set, the kubelet auto-detects the IP from the default route, which can cause issues in multi-homed nodes (e.g., nodes with public and private interfaces). The `KubeletConfiguration` object (option E) allows setting `nodeIP` in a structured YAML/JSON format, which is the recommended approach for Kubernetes v1.20+ as it supports dynamic reconfiguration via the kubelet config file.
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.
TExam Day Tips
→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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKA question in full detail.
Cluster Architecture, Installation & Configuration — This question tests Cluster Architecture, Installation & Configuration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Setting the --node-ip flag in kubelet command line. — Option B is correct because the `--node-ip` flag explicitly sets the IP address that the kubelet uses to identify itself to the API server and other components. This flag directly configures the node's primary IP for kubelet-to-apiserver communication and is a standard method in both standalone kubelet and kubeadm-deployed clusters.
What should I do if I get this CKA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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