EX188 Container Image Building Practice Question
What is the primary benefit of utilizing multi-stage builds in Containerfiles?
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
✓
It allows you to produce a final production image containing only the application binary and runtime dependencies, significantly reducing image size and attack surface.
Multi-stage builds allow developers to use multiple FROM statements, leaving behind build tools and heavy SDKs in earlier stages and keeping production images small and secure.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It allows you to produce a final production image containing only the application binary and runtime dependencies, significantly reducing image size and attack surface.
Why this is correct
This is the core purpose of multi-stage builds.
- ✗
It automatically encrypts environment variables stored in the image layers.
Why it's wrong here
Containerfile instructions and layers are not encrypted by default through multi-stage builds.
- ✗
It bypasses the need for a container registry when sharing images.
Why it's wrong here
Registries are still required for distribution.
- ✗
It speeds up local DNS resolution during container execution.
Why it's wrong here
Multi-stage builds affect the build process and resulting image size, not runtime DNS.
About these practice questions
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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.