Welcome to your interview.
The question is on your right: Real-Time Email and SMS Notifications. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Describe how you would architect a notification system that sends real-time updates to users via email and SMS based on various system events at The Zebra.