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 daemon.
• 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
  76% (26)
• B
  3% (1)
• D
  15% (5)
• E
  6% (2)

Explanation

A is correct because Linux crontab is per-user by design - each user runs crontab -e to manage their own schedule, and root can also manage system-wide jobs separately.

C is correct because the cron daemon (e.g., crond) watches for crontab changes and reloads them automatically - no manual restart is needed when you edit via crontab -e.

Why the distractors are wrong:

• B is the opposite of C - cron detects changes itself, no reload required.
• D is close but wrong: @hourly expands to 0 * * * * (top of each hour), but @daily or other aliases differ - and more importantly, the question says "hourly" not @hourly, making it imprecise/false.
• E is false - a single cron daemon handles all users' crontabs; one daemon per crontab would be wildly inefficient and is not how cron works.

Memory tip: Think of crontab like email - every user has their own mailbox (A), and the mail server (cron daemon) automatically picks up new messages without restarting (C). One mail server serves everyone (not E).

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