GATE 2020 experiences

IIT Indore Ms by research interview experience May 2020 I was shortlisted for Ms by research in CSE program for 2020-21 academic year. The interview is conducted using Google-meet on 12th May. The exact questions asked by them are: 1. Tell me about yourself? 2. What are your favorite subjects?(Told DBMS and Algorithms) 3. What are the different algorithmic design techniques? 4. When should we use greedy? 5. When should we use dynamic programming? 6. Which is best greedy or dynamic programming? 7. What is stack memory and heap memory? 8. What is the difference between tree and a graph? 9. What are the real life applications of stacks? 10. What are the applications of stacks in compiler deisgn and in program execution? 11. What is a memory leak? 12. What is a dangling pointer? 13. What is a friend function? 14. How to find the rank of an element in an unsorted array? 15. What are linear time sorting algorithms? I have answered almost all the questions correctly except the the 7th one. I