Round 1:
How to make class immutable
Singleton design pattern
Lru cache implementation
difference between abstraction and encapsulation
types of polymorphism
Round 2:
Discussion about current project
Concurrent hashmap vs synchronized map in detail
Left view of tree
Round 3:
complete architecture of current project
find nth max salary without traversing complete table
in binary tree print all nodes at distance k from given node
design car manufacturing company software sysytem
clustered indexes in sql
