Determining cron.allow access | LinuC Level 1 102 Exam original practice question

1.08.2Basic

/etc/cron.allow exists and contains only alice. /etc/cron.deny contains bob.

Determine who may use user crontabs.

Which statement is correct?

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.

cron.allow: An access-control file whose listed users are allowed to use user crontabs when it exists.
cron.deny: An access-control file that excludes listed users when an allow file is absent.
Allow-list precedence: The rule that an existing allow list limits access to its listed users.
Crontab access control: The authorization check applied before a user can create or edit a crontab.

Detailed explanation

Correctaliceだけが許可対象となる

Correct. alice is the only listed allowed user.

Incorrectbob以外の全員が許可対象となる

Incorrect. The existence of cron.allow means deny alone does not decide access.

Incorrectaliceとbobの両方が許可対象となる

Incorrect. bob is not listed in cron.allow.

Incorrect全員が許可対象となる

Incorrect. The allow file explicitly lists alice.

An example you can run in a temporary verification environment.

printf '%s
' alice | grep -Fx alice

alice

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-102-1045

EnvironmentPOSIX grep / 模擬一覧のみ

Last technical review2026-08-13

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