Celery quiz

Test your Celery knowledge with a free interactive quiz — 43 questions with answers and explanations. No signup needed to play.

What does concurrency (e.g. --concurrency=4) control when starting a Celery worker?

1. What does concurrency (e.g. --concurrency=4) control when starting a Celery worker?
2. What role does a message broker (e.g. Redis or RabbitMQ) play in a Celery setup?
3. What is a Celery worker?
4. What is the difference between .delay() and .apply_async()?
5. What does result.status return for a task that is currently being executed by a worker?
6. What is the purpose of specifying a named queue when calling apply_async(queue='emails')?
7. What does the max_retries option on a Celery task control?
8. Can a single Celery deployment use multiple named queues consumed by different worker groups?
9. In Celery Beat's beat_schedule, what does the crontab() helper let you express?
10. What is the purpose of a result backend in Celery?
11. What decorator turns a plain Python function into a Celery task?
12. What process is responsible for scheduling and dispatching periodic (cron-like) tasks in Celery?

More quizzes