The first round was a telephonic call where the interviewer asked about the things mentioned in my resume. They asked about databases the most, specifically SQL and MongoDB.

The next round was face-to-face, and I was asked to bring my laptop. It was a design round where a problem was given, and I had to provide a working solution after discussing it with the interviewer.

The next round was with the Hiring Manager, which was also face-to-face. They discussed the projects I had worked on and explained the project I would be working on. They also asked a few problem-solving questions.

After that was the last round with the HR, where questions related to my behavior were asked.

1. Design a notification system. There are multiple channels via which you can send notifications, and their success rates are given. Choose the best channel and also handle the case if a channel fails to send a notification.

2. Given two sorted arrays of size m and n+m, merge them into one single sorted array without extra space and in O(n) time.

3. You have a huge stream of numbers coming in, say n numbers which are distinct but not in order. There are two numbers missing from it. Find those missing two numbers.