system-design

Distribute discount coupons evenly between new and old users Question: I recently got this problem in an interview. Suppose you have 3 types of coupon: Free Shipping( To be distributed to 10% users) By one Get One (To be distributes to 10% users) Flat 10% off (To be distributed to 80%) The tasks is to …

Django celery error while adding tasks to RabbitMQ message queue : AttributeError: 'ChannelPromise' object has no attribute '__value__' Question: I have setup celery, rabbitmq and django web server on digitalocean. RabbitMQ runs on another server where my Django app is not running. When I am trying to add the tasks to the queue using delay …