EX188 Container Image Building Practice Question
Which THREE practices are recommended when optimizing cache utilization during image builds with podman build?
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
✓
Place instructions that change frequently, such as COPYing source code, near the end of the Containerfile.
To maximize cache efficiency, place instructions that change frequently (like copying source code) lower down in the Containerfile, group related installation steps into single RUN commands, and order instructions from least frequently changed to most frequently changed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use the --no-cache flag on every routine build to ensure absolute freshness.
Why it's wrong here
Disabling the cache defeats the performance optimization purpose of build caching.
- ✗
Always place COPY . . at the very top of the Containerfile before installing software dependencies.
Why it's wrong here
Placing COPY . . at the top would invalidate the build cache on any trivial source code change.
- ✓
Place instructions that change frequently, such as COPYing source code, near the end of the Containerfile.
Why this is correct
Delaying frequent changes prevents invalidating the cache for upstream setup layers.
- ✓
Combine related package installation and cleanup steps into a single RUN instruction.
Why this is correct
Combining commands into one RUN layer reduces image layer count and keeps cache boundaries logical.
- ✓
Order Containerfile instructions from least frequently changed to most frequently changed.
Why this is correct
Stablishing static base layers first preserves build cache validity longer.
About these practice questions
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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.