The process took 5 days. The interviewer was asking questions on a very basic level, like access modifiers and variable memory location, and also expecting coding using different DSA. Basically, be prepared for anything. You will need better luck for this kind of interview.

Balance string programs, using stack basically coding will be asked on DS.

Backend microservice architecture and its advantage, deployment process.

Java exception handling, custom class, access modifiers, basic of OOPs.

API response code and different scenarios on add to cart functionality.