1st round:

1. OOP concepts
2. https://leetcode.com/problems/house-robber/
3. Design a parking lot

2nd round:

1. Sort an array of employee objects based on salary (here salary was an attribute of employee object)
   Soln: expectation was to implement comparator interface and override compare method and then use Collections.sort Eg: https://howtodoinjava.com/sort/sort-arraylist-objects-comparable-comparator/
2. How do you create your own Exception class