305-300 Container Virtualization Practice Question
What is the primary difference between a container image and a container instance?
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 is the template; the instance is the running process
A container image is a read-only template, whereas a container instance is a writable, running version of that image.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Images are stored in RAM, instances are on disk
Why it's wrong here
Both reside on disk; images are layers, instances are layers plus a writable layer.
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The image is the template; the instance is the running process
Why this is correct
Images are immutable blueprints; containers are the operational runtime.
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Instances cannot be stopped
Why it's wrong here
Containers can be stopped at any time.
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The instance is the template; the image is the running process
Why it's wrong here
This is the reverse of the actual relationship.
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They are the same thing
Why it's wrong here
They are distinct concepts in Docker.
About these practice questions
This 305-300 question is part of Courseiva's 194-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official LPI exam blueprint
This 305-300 practice question is part of Courseiva's free LPI 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 305-300 exam.