Understanding systemd and PID 1 | LinuC Level 1 101 Exam original practice question

1.01.3Basic

A Linux system using systemd has completed kernel initialization.

Which statement about systemd is correct?

Hint 1: Focus on the requirement

Locate the system manager that starts after the kernel and owns the initial process.

Hint 2: Key terms

Review the short definitions before comparing the boot and systemd choices.

systemd: An init system and service manager that coordinates units and targets.
PID 1: The process identifier reserved for the initial user-space process.
Unit: A systemd resource definition such as a service, mount, socket, or target.
System manager: The system-wide systemd instance that manages boot and shutdown.

Detailed explanation

Correct通常はPID 1として起動し、unitの依存関係に従ってsystemを立ち上げる

Correct. systemd normally runs as PID 1 and manages units and targets.

IncorrectUEFIより前に起動してhardwareを検出する

Incorrect. UEFI runs before the kernel and systemd.

Incorrect各利用者のSSH秘密鍵を生成するだけのcommandである

Incorrect. Generating SSH keys is not systemd's sole role.

Incorrect停止済みVMだけを一覧表示するtoolである

Incorrect. virsh is used to list VMs; systemd is a system manager.

An example you can run in a temporary verification environment.

ps -p 1 -o pid=,comm=

systemd環境ならPID 1 systemd等

Environment: systemd採用Linux
Use read-only commands or a disposable Linux instance when checking boot metadata.
Exact unit names and command output can vary slightly by distribution.

Foundation review

On a systemd host, PID 1 resolves unit dependencies and moves the system toward a target.

Compare the command name of PID 1 with the unit information shown by systemctl.

Question IDKL-101-339

Environmentsystemd採用Linux

Last technical review2026-08-13

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