1. What motivates you at work?

2. What is your strength?

3. Find an element in an array in O(1) space and O(N) time, using a character array from 1 to 127.

4. 1) Explain the internal workings of HashMap 2) Difference between HashMap and ConcurrentHashMap 3) Difference between failfast and failsafe iterator

5. What are generics?