You want to run a Flask Celery task every Monday at 8:30 AM using Celery Beat. Which beat_schedule entry is correct?

hard📝 Application Q15 of 15

Flask - Background Tasks

You want to run a Flask Celery task every Monday at 8:30 AM using Celery Beat. Which beat_schedule entry is correct?

A{'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week='mon')}

B{'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week=2)}

C{'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week='tue')}

D{'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week='Monday')}

Step-by-Step Solution

Solution:

Step 1: Understand crontab day_of_week format
Celery's crontab accepts day_of_week as string names like 'mon', 'tue', or integers 0-6 (0=Sunday).
Step 2: Evaluate options
{'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week='mon')} uses 'mon' string which is correct. {'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week=2)} uses integer 2 which is Tuesday (0=Sunday). {'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week='tue')} uses 'tue' string which is Tuesday. {'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week='Monday')} uses 'Monday' full name which is not supported.
Final Answer:
{'task': 'app.weekly_task', 'schedule': crontab(hour=8, minute=30, day_of_week='mon')} -> Option A
Quick Check:
Use 'mon' string for Monday in crontab [OK]

Quick Trick: Use three-letter lowercase day names like 'mon' for crontab [OK]

Common Mistakes:

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