This KCNA practice question tests your understanding of kubernetes fundamentals. 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.
Which THREE of the following are valid ways to create a Kubernetes resource using kubectl?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
kubectl run nginx --image=nginx
Option B is correct because `kubectl run nginx --image=nginx` creates a Pod imperatively, which is a valid way to create a Kubernetes resource directly from the command line without a manifest file. This command generates a Pod named 'nginx' using the specified container image, and it is a supported method for quick testing or ad-hoc resource creation.
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.
✗
kubectl exec -it pod-name -- /bin/bash
Why it's wrong here
Executes a command in a running container, not used to create resources.
✓
kubectl run nginx --image=nginx
Why this is correct
Creates a deployment or pod running the specified image.
Related concept
Read the scenario before looking for a memorised answer.
✗
kubectl logs pod-name
Why it's wrong here
Prints logs from a container, not used to create resources.
Read the scenario before looking for a memorised answer.
✓
kubectl apply -f deployment.yaml
Why this is correct
Applies a configuration to a resource, creating it if it doesn't exist.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between commands that create resources versus commands that interact with existing resources, so candidates may mistakenly think `kubectl exec` or `kubectl logs` can create resources because they are common kubectl commands.
Trap categories for this question
Command / output trap
Executes a command in a running container, not used to create resources.
Detailed technical explanation
How to think about this question
Under the hood, `kubectl run` generates a Pod manifest and sends it to the Kubernetes API server as a POST request to the `/api/v1/namespaces/{namespace}/pods` endpoint. The imperative `kubectl create -f` and declarative `kubectl apply -f` both read a YAML or JSON manifest and submit it to the API, but `apply` uses a PATCH request to manage state via last-applied-configuration annotations, enabling drift detection. In real-world CI/CD pipelines, `kubectl apply` is preferred for its idempotent behavior, while `kubectl run` is often used for quick debugging or one-off tasks.
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 KCNA 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 KCNA question in full detail.
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: kubectl run nginx --image=nginx — Option B is correct because `kubectl run nginx --image=nginx` creates a Pod imperatively, which is a valid way to create a Kubernetes resource directly from the command line without a manifest file. This command generates a Pod named 'nginx' using the specified container image, and it is a supported method for quick testing or ad-hoc resource creation.
What should I do if I get this KCNA 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.
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 →
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.
This KCNA 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 KCNA 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.