Medium coding round followed by 2 harder interview rounds and HR

Application

I applied through university. I interviewed at Zomato

Interview

It was a good experience. The first round was Coding round. Then followed by 2 interviews rounds and then hr. The coding round was medium level and the interviews were on harder side.

Interview questions [1]

Question 1

What is index in Database, how it helps. And 2 DSA medium questions.