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Docker Exam DCA Topic 1 Question 80 Discussion

Actual exam question for Docker's DCA exam
Question #: 80
Topic #: 1
[All DCA Questions]

Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?

Solution. capabilities

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Suggested Answer: B

Capabilities are not a Linux kernel facility that limit a Docker container's access to host resources, such as CPU or memory. Capabilities are a Linux kernel feature that divide the privileges of the root user into distinct units, called capabilities, which can be independently enabled or disabled for each process. Capabilities allow fine-grained control over the operations that a process can perform on the system, such as binding to a privileged port, changing the system time, loading kernel modules, etc. Docker uses capabilities to restrict the default set of capabilities available to the root user inside a container, following the principle of least privilege. However, capabilities do not affect how much CPU or memory a container can use on the host system. Reference: https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities, https://man7.org/linux/man-pages/man7/capabilities.7.html


by Joesph at Jan 25, 2024, 11:45 PM

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