KCNA Container Orchestration Practice Question
Which TWO statements about the Container Runtime Interface (CRI) are correct? (Select 2)
⚠ Common exam trap
Many exam-takers confuse CRI with OCI or assume Docker is still the default CRI implementation, when in fact Docker is not CRI-compliant and was removed as a built-in runtime in Kubernetes 1.24.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CRI allows Kubernetes to use different container runtimes
The Container Runtime Interface (CRI) is a plugin interface that enables kubelet to use a variety of container runtimes without needing to recompile Kubernetes. It defines the API between kubelet and the container runtime, allowing runtimes like containerd and CRI-O to be swapped in seamlessly. This abstraction decouples Kubernetes from any single runtime, enabling flexibility and vendor neutrality.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Docker is the primary CRI implementation
Why it's wrong here
Docker is deprecated; containerd and CRI-O are primary.
- ✗
CRI is responsible for pulling container images
Why it's wrong here
CRI defines the interface; the runtime handles image pulling.
- ✓
CRI allows Kubernetes to use different container runtimes
Why this is correct
CRI is a plugin interface that abstracts the container runtime.
- ✗
CRI is an OCI specification
Why it's wrong here
CRI is a Kubernetes API, not an OCI spec.
- ✓
containerd and CRI-O are CRI-compliant runtimes
Why this is correct
Both implement the CRI.
Go deeper
Related to this question
Learn chapter
Kubernetes Overview and Core Components
Key term
ReplicaSet and Replication
A ReplicaSet ensures a specified number of identical pod instances are running at all times in Kubernetes, using replication to maintain availability and stability.
Key term
Container Runtime Interface
The Container Runtime Interface (CRI) is a standardized plugin protocol that allows Kubernetes to work with different container runtimes without needing to change its core code.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.