This 200-901 practice question tests your understanding of application deployment and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A developer is using a Dockerfile to build an image. The image must be based on a minimal Linux distribution to reduce attack surface. Which base image should be used?
alpine:latest
Alpine is a minimal distribution (~5 MB) ideal for security.
ubuntu:latest
Why wrong: Ubuntu is a general-purpose distribution, not minimal.
debian:latest
Why wrong: Debian is also larger than Alpine.
centos:latest
Why wrong: CentOS is larger and not minimal.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
alpine:latest
Alpine Linux is a minimal Linux distribution designed for security, simplicity, and resource efficiency. Its base image is typically around 5 MB, significantly reducing the attack surface compared to full-featured distributions like Ubuntu, Debian, or CentOS. This makes it the ideal choice for minimizing vulnerabilities in containerized applications.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
alpine:latest
Why this is correct
Alpine is a minimal distribution (~5 MB) ideal for security.
Related concept
Read the scenario before looking for a memorised answer.
ubuntu:latest
Why it's wrong here
Ubuntu is a general-purpose distribution, not minimal.
debian:latest
Why it's wrong here
Debian is also larger than Alpine.
centos:latest
Why it's wrong here
CentOS is larger and not minimal.
Common exam traps
Cisco often tests the concept that 'minimal' means fewer packages and smaller size, not just a different package manager, and the trap here is that candidates may choose a familiar distribution like Ubuntu or CentOS without considering the attack surface implications of a bloated base image.
Detailed technical explanation
Alpine uses musl libc instead of glibc and BusyBox for core utilities, which drastically reduces its size and complexity. This can cause compatibility issues with applications compiled against glibc, requiring static linking or the installation of compatibility libraries (e.g., gcompat). In real-world scenarios, developers often choose Alpine for microservices and CI/CD pipelines where image size and security are critical, but must test for glibc-dependent behavior.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 200-901 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Application Deployment and Security — This question tests Application Deployment and Security — Read the scenario before looking for a memorised answer..
The correct answer is: alpine:latest — Alpine Linux is a minimal Linux distribution designed for security, simplicity, and resource efficiency. Its base image is typically around 5 MB, significantly reducing the attack surface compared to full-featured distributions like Ubuntu, Debian, or CentOS. This makes it the ideal choice for minimizing vulnerabilities in containerized applications.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This 200-901 practice question is part of Courseiva's free Cisco 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 200-901 exam.
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