Wynk Software Developer interview questions

Wynk came to our college for campus hiring. Firstly, we had an online coding round hosted on hackerrank which was followed by 3 rounds of interviews. The quality of the interviews were good and the interviewers were smart and knowledgeable. Post the screening contest on hackerrank, i had an interview in which i was asked the following questions and questions on Linked lists and Trees. This round was followed by a managerial and an HR round.