1. Core java concepts like private constructors, polymorphism, Object creation for String, why it is immutable, heap and stack management. Collection framework detailed explanation on each each interface, hashmap and hashtable difference 2. What are the things to consider for selenium automation framework creation, how to run multiple browser in multiple OS using grid, how to use set cookie and clear cookie for session management. Return type for get and navigate methods, Return type for getLocation method, different between findElement and findElements, how to do visual validation, few basics on docker, what are the things to consider during peer code review difference between let and var in jscript