1. What is Hashing
    1. Why Overriding hashCode and equals is Required
    1. Load Factor and Treeification
    1. Why hashCode Override is Necessary
    1. What is Map in Java
    1. TreeMap, MultiMap, WeakMap, SortedMap, NavigableMap
    1. What is Entry Class in Java
    1. What are Enums
    1. Records in Java
    1. Anonymous Class, Static Inner Class, Inner Class and Local Class