This KCNA practice question tests your understanding of container orchestration. 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.
apiVersion: v1
kind: Pod
metadata:
name: mypod
spec:
containers:
- name: app
image: nginx:latest
ports:
- containerPort: 80
- name: sidecar
image: alpine:latest
command: ["sleep", "3600"]Refer to the exhibit. How many containers are defined in this Pod?
apiVersion: v1
kind: Pod
metadata:
name: mypod
spec:
containers:
- name: app
image: nginx:latest
ports:
- containerPort: 80
- name: sidecar
image: alpine:latest
command: ["sleep", "3600"]2
The YAML defines two containers.
1
Why wrong: There are two containers listed.
3
Why wrong: Only two containers are defined.
0
Why wrong: There are two containers.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
2
The exhibit shows a Pod manifest with two container definitions under the `containers` field: one named `nginx` and one named `sidecar`. In Kubernetes, the number of containers in a Pod is determined by counting the entries in the `spec.containers` list, not including init containers or ephemeral containers unless explicitly specified. Therefore, the correct answer is 2.
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.
2
Why this is correct
The YAML defines two containers.
Related concept
Read the scenario before looking for a memorised answer.
1
Why it's wrong here
There are two containers listed.
3
Why it's wrong here
Only two containers are defined.
0
Why it's wrong here
There are two containers.
Common exam traps
The trap here is that candidates may miscount containers by including init containers or ephemeral containers, or mistakenly think the number of images referenced equals the number of containers, when the manifest explicitly lists only two containers in the `containers` array.
Detailed technical explanation
In Kubernetes, a Pod is the smallest deployable unit and can host multiple containers that share the same network namespace, storage volumes, and lifecycle. The `spec.containers` field is a required list; each entry defines a separate container image, ports, and resource limits. Init containers, defined under `spec.initContainers`, run to completion before the main containers start and are not counted as part of the Pod's running containers for this question. Real-world scenarios like sidecar proxies (e.g., Envoy) or logging agents often use multi-container Pods to extend functionality without modifying the primary application.
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 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.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Container Orchestration — This question tests Container Orchestration — Read the scenario before looking for a memorised answer..
The correct answer is: 2 — The exhibit shows a Pod manifest with two container definitions under the `containers` field: one named `nginx` and one named `sidecar`. In Kubernetes, the number of containers in a Pod is determined by counting the entries in the `spec.containers` list, not including init containers or ephemeral containers unless explicitly specified. Therefore, the correct answer is 2.
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 11, 2026
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.
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