Infosys Technical Lead interview questions

What is your project, Explain? What is Polymorphism and Encapsulation, Aggregation, Abstraction, Interface with an example of your current project? When to override equals and hashcode? Given a class A{ ... ... } A a= new A("ss"); A a1= new A("ss"); a == a1 and a.equals.a1 ? What design pattern you have used so far in your project? Two lists are their list = {14,6,7,9,1}; list2= {3,7,9,2,4}, sort whole list but list should be remain 2 separate lists. How hash map works internally? what if the hashcode will be constant always? Round 2: Joins all types Index HR Round