Spreading anacron start times | LinuC Level 1 102 Exam original practice question

1.08.2Basic

Add up to 20 minutes of random delay so multiple anacron jobs do not start simultaneously.

Which setting is appropriate?

Hint 1: Focus on the scheduling model

Separate recurring schedules, one-time jobs, access-control files, and catch-up behavior before comparing the commands or settings.

Hint 2: Key terms

Review the short definitions of recurring schedules, one-time jobs, access-control files, and catch-up behavior involved.

RANDOM_DELAY: An anacron setting that caps an additional random delay in minutes.
Base delay: The fixed per-job wait specified in an anacrontab entry.
Load spreading: Distributing job start times to reduce a simultaneous resource spike.
Anacron: A periodic scheduler whose jobs can combine a fixed delay with random delay.

Detailed explanation

CorrectRANDOM_DELAY=20

Correct. RANDOM_DELAY=20 sets the requested upper bound.

IncorrectSTART_HOURS_RANGE=20

Incorrect. START_HOURS_RANGE controls allowed hours, not random delay.

IncorrectDELAY=RANDOM:20

Incorrect. DELAY=RANDOM:20 is not the standard setting name.

IncorrectNICE_DELAY=20

Incorrect. Nice priority is unrelated to start-time randomization.

An example you can run in a temporary verification environment.

printf '%s
' 'RANDOM_DELAY=20' | cut -d= -f2

Foundation review

A scheduler for recurring jobs described by a time-field table.

A scheduler for one-time jobs queued for a specified time.

A scheduler that can run periodic jobs after a system was unavailable.

Question IDKL-102-1053

EnvironmentPOSIX cut / 模擬設定のみ

Last technical review2026-08-13

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