1. Java coding: find the longest substring from a string, In an array {1,0,2,3,0,4,0,0} the output should be {1,2,3,4,0,0,0,0}
2. Stream APIs in JAVA, get the first and second highest in an array using Streams
3. Get data from the Hash Map, using entry set
4. take input from the system as string and shift it to 3, ex: Tuesday and output should be: sdayTue