Pergunta de entrevista da empresa Ola

In assessment, there were two section i) Java related ii) DS based question(3 questions: Level-avg) In HLD they asked me to design Tiny URL and in DS - Find Longest Palindrome String In DS+Algo, there were three questions i) I forgot this one ii) Array of Array Products iii) Find number of min swaps to sort an array (Range: 0,1,2,...n-1) In Techno Managerial, they asked me LLD of Ticket Booking System (a subpart only)