Which THREE statements about crontab are true?

Which THREE statements about crontab are true?

Which THREE statements about crontab are true?

A.
Every user may have their own crontab.

B.
Changing a crontab requires a reload/restart of the cron deamon.

C.
The cron daemon reloads crontab files automatically when necessary.

D.
hourly is the same as "0 * * * *".

E.
A cron daemon must run for each existing crontab.

Explanation:
From the man pages:
Additionally, cron checks each minute to see if its spool directory’s modtime (or the modtime on /etc/crontab) has changed, and if it has, cron will then examine the modtime on all crontabs and reload those which have changed. Thus cron need not be restarted whenever a crontab file is modified. Note that the crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.



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