1st Phone Interview (45 minutes): 1) SQL: Joins, Primary Key, Foreign Key, BETWEEN clause 2) Constructors 2nd Phone Interview (1 hour): 1) Implement add functionality in ArrayList. 2) Why do we use linked list and array list? 3) Reverse an integer array. 3rd Phone Interview(1 hour): 1) Difference between Abstract Classes and Interfaces? When do we use each of them? 2) Design a Zoo using Animal, Cages class. 3) What is Object oriented programming? 4) Difference between overloading and overriding.