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XK0-006 Practice Question: A system administrator needs to configure a cron…
A system administrator needs to configure a cron job to run a script every Monday at 3:00 AM. Which two cron expressions are correct? (Select TWO).
⚠ Common exam trap
CompTIA often tests the misconception that day-of-week `0` is Monday (it is Sunday) and that using a specific day-of-month value like `1` combined with a day-of-week value still runs every Monday (it actually runs only when both conditions are true, but cron uses OR logic, so it would run on the 1st of any month OR any Monday, not just Mondays).
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
0 3 * * 1
The cron expression `0 3 * * 1` schedules the script to run at minute 0, hour 3 (3:00 AM), every day of the month (`*`), every month (`*`), and on Monday (day-of-week 1, where 0=Sunday, 1=Monday). Option E is correct because cron also accepts three-letter abbreviations for days of the week, so `Mon` is equivalent to `1`.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
0 3 * * 0
Why it's wrong here
0 is Sunday, not Monday.
- ✗
0 3 1 * 1
Why it's wrong here
Runs on the 1st of the month AND on Monday, not every Monday.
- ✓
0 3 * * 1
Why this is correct
Correct: minute 0, hour 3, any day, any month, Monday.
- ✗
0 3 * * 1-5
Why it's wrong here
Runs Monday through Friday, not just Monday.
- ✓
0 3 * * Mon
Why this is correct
Correct: uses weekday name.
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