Campus interview 1. Summation of 2 numbers to X in a given list of Numbers 2. Longest Palindrome Substring 3. Design of Datastructure : to have O(1) - access, delete. recently used Onsite Interview 1. last integer remaining in a number list of 100 if every number were to shoot his neighbour in cyclic fashion eg 1->2->3->5->6->7->8->9->10->1 2. reverse number 3. to chose when to buy/sell given a forecast of next N days's prices of given stock , u are allowed to buy/sell only one stock multiple number of times. objective - maximize profit