I received an email from Booking HR giving me details of the interview process and a brief introduction to Booking. A few stories of people working with Booking were also shared.

For the first technical round, Skype and Etherpad were used. They asked algorithm-based questions and then conducted a technical discussion on the solutions I provided. After that, Android questions were asked, which were related to the activity lifecycle, AsyncTask, and file I/O.

Write a program to find the first non-repeated character in a string.

Which Activity lifecycle methods are called when you press the back button?

You want to download a heavy file in onCreate and save it to disk when the Activity is destroyed, without slowing down the startup and shutdown of the Activity. How would you achieve this?