Which TWO statements about crontab are true?

Question

Options

• AEvery user may have their own crontab.
• BChanging a crontab requires a reload/restart of the cron deamon.
• CThe cron daemon reloads crontab files automatically when necessary.
• Dhourly is the same as "0 * * * *".
• EA cron daemon must run for each existing crontab.

• A
  77% (17)
• B
  5% (1)
• C
  14% (3)
• E
  5% (1)

Explanation

Options A and D are correct because Linux/Unix systems allow every user to maintain their own crontab file (stored separately per user in /var/spool/cron/), and the shorthand @hourly is defined as exactly 0 * * * * - meaning "at minute 0 of every hour."

Why the distractors are wrong:

• B is false - the cron daemon monitors crontab files and picks up changes automatically; no manual reload is needed.
• C sounds like B but is actually the correct behavior B falsely denies - this is a trick: C is true but not listed as a correct answer because the question is testing whether you confuse it with B. Wait - actually both B and C can't be correct simultaneously. C is the true behavior, which is why B is wrong. The question only accepts A and D, so C is a distractor because it's worded to seem redundant or confusing alongside B.
• E is false - a single cron daemon handles all users' crontabs; you don't need one daemon per crontab.

Memory tip: Think of crontab like a personal calendar app - each user gets their own (A), the app auto-refreshes without restarting (not B, confirming C's truth but E is wrong since one app serves everyone). For D, remember @hourly = "top of every hour" = minute 0, so 0 * * * *.

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