1. java concepts: OOP, interface, abstract class, Threads. 2. Linked List questions. 3. Asked to describe the course projects in detail. Asked questions based on that. 4. Other DS like Tree, Graph and application of such data structures.

On Campus Interview: First round: Online test for 2 hours consisting of two sections. Each section had 4 coding question. Atleast two question should be solved in each section. First section has basic implementation question which can be solved using loops and some logic. Second section had permutation and combination, DP, graphs question. 6 shortlisted for next round Second Round: It was a tech interview on Google hangouts. Interviewer focused mainly on oops concepts, data structure and SQL. Also the interviewer asked me to explain all the projects mentioned in my resume. Some basic hr question were also asked. Third Round: Again, the interview was on Google hangouts. Asked some basic c questions on pointers. Also, the interviewer asked me to mention all the technologies I used in my projects. Again some basic hr question. Both the interviewer were very friendly and helpful.