Running a job every 15 minutes | LPIC-1 102-500 Exam original practice question

107.2Standard

Run check at minute 0, 15, 30, and 45 of every hour.

Which schedule is appropriate?

Hint 1: Focus on scheduling scope

Separate recurring and one-time jobs, access-control files, and execution context before comparing the choices.

Hint 2: Key terms

Review the short definitions of recurring jobs, one-time jobs, and scheduling controls.

Step notation: The /N syntax that selects every Nth value from a wildcard or range.
Minute field: The cron field that controls which minutes within each hour match.
Execution frequency: The recurrence with which a schedule match starts a job.
Job overlap: A condition in which a new run starts before the previous run has finished.

Detailed explanation

Incorrect15 * * * * check

Incorrect. It runs only at minute 15.

Incorrect* 15 * * * check

Incorrect. It runs every minute during hour 15.

Correct*/15 * * * * check

Correct. */15 matches minutes 0, 15, 30, and 45.

Incorrect* */15 * * * check

Incorrect. It steps through hours and runs every minute in those hours.

An example you can run in a temporary verification environment.

seq 0 59 | awk '$1 % 15 == 0' | paste -sd, -

0,15,30,45

Foundation review

Check whether the command acts on the current shell, a new process, an existing process, or a file.

Use the supplied command and compare the output with the expected result.

Question IDKP-107-687

EnvironmentGNU seq / awkによる時刻集合確認

Last technical review2026-08-13

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