Visa Inc. Software Developer interview questions

No change to get Interview.

1) Design Uber (what services would make it up, how to scale it, tech you have used before that would be applicable) 2) standard Min Heap question from leetcode 3) implement a queue with 2 stacks 3) write an algorithm to traverse a graph similar to google maps with both dfs and bfs and list the pros and cons of both. Also how would you optimize the speed at which the api call is made from client to server (caching, fragmenting DB, using LTM, graphs are served on a region by region basis, etc)