KCSA Platform Security Practice Question
Which TWO of the following mechanisms are standard methods used by container runtimes (such as containerd or CRI-O) to isolate container workloads from the host kernel and other containers? (Choose TWO)
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
✓
Control Groups (cgroups)
Container runtimes rely heavily on Linux kernel namespaces (to isolate system views such as network, process IDs, and mounts) and control groups (cgroups, to limit CPU, memory, and I/O resources).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Disabling the Linux virtual memory manager cluster-wide
Why it's wrong here
The Linux virtual memory manager is a core kernel subsystem and cannot or should not be disabled for container isolation.
- ✗
Hypervisor-based hardware virtualization for every container instance
Why it's wrong here
Standard containers share the host kernel and do not run a separate hypervisor per container (unlike specialized microVM runtimes like Kata Containers).
- ✗
Executing all container processes inside the host root process namespace
Why it's wrong here
Sharing the host process namespace would compromise isolation, which runs counter to how container runtimes operate.
- ✓
Control Groups (cgroups)
Why this is correct
Cgroups limit, account for, and isolate the resource usage (CPU, memory, disk I/O) of a collection of processes.
- ✓
Linux Namespaces
Why this is correct
Namespaces isolate system resources such as network interfaces, mount points, and process trees per container.
About these practice questions
One of 320 original KCSA practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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 CNCF / Linux Foundation exam blueprint
This KCSA practice question is part of Courseiva's free CNCF / Linux Foundation 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 KCSA exam.