EX188 Container Image Building Practice Question
When writing a Containerfile, which instruction specifies the base image to be used for the subsequent build steps?
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
✓
FROM
Every Containerfile must start with a FROM instruction to define the base 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.
- ✗
BASE
Why it's wrong here
BASE is not a valid instruction.
- ✗
INIT
Why it's wrong here
INIT is not a valid instruction.
- ✓
FROM
Why this is correct
FROM initializes a new build stage and sets the Base Image.
- ✗
PARENT
Why it's wrong here
PARENT is not a valid instruction.
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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 Red Hat exam blueprint
This EX188 practice question is part of Courseiva's free Red Hat 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 EX188 exam.