First Round Questions CSS: 1. Create a Rectangle 2. Create Circle 3. Put a circle in the middle of the rectangle. DS: 1. Question was on array, I don't remember but it was so easy. React: 1. Create a type-ahead search, he will give an API, you have to implement it and also add debouncing. Second round: System Design Customer Engagement Engine Create an engine to send notifications to users based on their activity/inactivity The engine should be usable by the entire organization to send notifications based on their rules Users should be able to create rules such as: If three specific events are done in sequence, then send a notification If two events are done but third is not done for 3 hours, then send a notification The system should be highly scalable Objective Come up with the design of the system Provide details about how the system will interact with other systems List the components which you would use and why Discuss which points would be the bottleneck in the system Example: An e-commerce app customer wants to set up automation so that whenever a user visits 3 refrigerator product pages by the same vendor within a 4 hour window, then she gets a notification on the phone asking if she wants to talk to an expert about refrigerators.