Practice Test Geeks(SAC) System Administration Certification Practice Test
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Operating Systems and System Configuration Flashcards

7 cards from real SAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Operating Systems and System Configuration flashcards as text

  1. In Linux, which file defines default environment variables for all users logging in via a shell?

    Answer: /etc/profile

    /etc/profile is executed for all users at login and is the standard place for system-wide environment variable defaults.

  2. What does the Windows System File Checker (sfc /scannow) do?

    Answer: Verifies and repairs protected system files

    sfc /scannow scans all protected Windows system files and replaces corrupted or missing files with cached copies.

  3. Which Linux command shows disk usage of each directory under a given path?

    Answer: du -sh *

    `du -sh *` displays a summarized, human-readable size for each file and directory in the current path.

  4. In Windows, what is the purpose of the Group Policy Object (GPO)?

    Answer: Centrally enforces configuration settings across users and computers

    GPOs allow administrators to centrally define and enforce security and configuration settings across users and computers in an Active Directory environment.

  5. Which file in Linux stores hashed passwords for user accounts?

    Answer: /etc/shadow

    /etc/shadow stores hashed passwords and password aging information, readable only by root for security.

  6. What is the default port used by the Windows Remote Desktop Protocol (RDP)?

    Answer: 3389

    RDP uses TCP port 3389 by default for remote desktop connections to Windows systems.

  7. Which Linux command is used to display and modify kernel runtime parameters?

    Answer: sysctl

    `sysctl` reads and writes kernel parameters at runtime, with settings persisted in /etc/sysctl.conf.