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Check yourself 03-users-groups-permissions-and-least-privilege: Quiz

Retrieval practice. Target >=80%.

Class 18: Users, groups, permissions, and least privilege
Class 18 visual reference. Use it as the map, then prove it in the reading, lesson, and lab.

Overview

Module: Linux Foundations
Activity type: Quiz / retrieval practice
Target: ≥80%
Objective: Explain the difference between a user ID, primary group, supplementary groups, and an account name.

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Questions

    1. What numeric credential does the kernel primarily use to identify a user for file ownership checks?
    1. What does execute permission on a directory allow?
    1. If a process owns a file, are the group and other mode classes added to the owner class during a traditional mode check?
    1. Why can a file with an apparently readable ACL entry still be inaccessible?
    1. Which permission on a parent directory is central to creating or removing entries in that directory?
    1. Why should permission testing be performed as the intended service or user identity?
    1. When is a group generally preferable to a named-user ACL?
    1. What does the POSIX ACL mask limit?
    1. Why might newly granted supplementary group membership not affect an existing shell?
    1. What two categories of test should a least-privilege verification plan contain?
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After scoring

  • Missed items → return to Reading → redo Feynman Retry → reattempt.
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