mediumMultiple ChoiceObjective-mapped
XK0-006 Practice Question: Uses Kubernetes to deploy containerized…
An organization uses Kubernetes to deploy containerized applications. A pod fails to start with an ImagePullBackOff error. What is the most likely cause?
⚠ Common exam trap
CompTIA often tests the distinction between ImagePullBackOff and CrashLoopBackOff, where candidates mistakenly attribute a pull failure to resource limits or port conflicts instead of recognizing it as a registry/image name issue.
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
✓
The image name is misspelled or does not exist in the registry
The ImagePullBackOff error in Kubernetes indicates that the kubelet is unable to pull the container image from the specified registry. The most common cause is a misspelled image name or a non-existent image in the registry, which prevents the container runtime from fetching the image. This triggers a back-off mechanism where the kubelet retries the pull with increasing delays.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The pod exceeded its memory limit
Why it's wrong here
Memory limit exceeded would cause OOMKilled, not ImagePullBackOff.
- ✗
The container port is already in use
Why it's wrong here
Port conflict would cause a different error, such as CrashLoopBackOff.
- ✗
The node is out of disk space
Why it's wrong here
Disk pressure would cause Evicted status, not ImagePullBackOff.
- ✓
The image name is misspelled or does not exist in the registry
Why this is correct
This is the most common cause of ImagePullBackOff.
Go deeper
Related to this question
Learn chapter
Networking Fundamentals and Configuration
Key term
Registry
The Windows Registry is a central hierarchical database that stores configuration settings and options for the operating system, hardware, software, and user preferences.
Key term
Organization
An Organization is a top-level container in Google Cloud that represents your company or entities and serves as the root node for all your cloud resources, policies, and access control.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA 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 XK0-006 exam.