Pergunta de entrevista da empresa Perficient

What is Celery? What is Pytest? What is story point in Scrum? What is marshmallow in Python? What are the steps to build a Rest API in Flask? A technical problem was given on where you were running an app with a certain design provided by the interviewer. The app design uses a queue to process the app requests, but suddenly the requests start flooding the app then you are asked what can you do to improve the app?