Linux_Foundation
LFCA · Question #69
LFCA Question #69: Real Exam Question with Answer & Explanation
The correct answer is D. cqroups. Cgroups (control groups) is the underlying Linux kernel technology that allows resource usage, such as CPU, memory, and network bandwidth, to be limited and isolated for processes and containers.
Submitted by daniela_cl· May 4, 2026System Administration
Question
What is the underlying technology that allows containers to be restricted to defined limits for system resource usage such as CPU, memory, and network bandwidth?
Options
- Aclimits
- BUnionFS
- CNamespaces
- Dcqroups
Explanation
Cgroups (control groups) is the underlying Linux kernel technology that allows resource usage, such as CPU, memory, and network bandwidth, to be limited and isolated for processes and containers.
Common mistakes.
- A. 'climits' is not a recognized Linux kernel feature or technology responsible for enforcing resource limits on containers.
- B. UnionFS provides the layered filesystem capabilities for containers, allowing multiple directories to appear as one, but it does not control resource usage like CPU or memory.
- C. Namespaces are a Linux kernel feature that provides process isolation for containers (e.g., PID, network, mount namespaces), but they do not directly limit resource usage such as CPU or memory.
Concept tested. Linux container resource management (cgroups)
Reference. https://docs.kernel.org/admin-guide/cgroup-v1/cgroups.rst
Topics
#Containers#cgroups#Resource Management#Linux Kernel
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