XTX Markets interview question

Networking: - Describe multicast - Describe what happens when a packet arrives, how it is processes Coding: - A coding exercise that takes 1 to 2 evenings (or a weekend) - Coding screen (after the long exercise!) - standard FANG type 20-minute question. - Algorithms questions: Find the shortest path on an infinite chess board, to a given co-ordinate, using knight-type moves, given a list of co-ords with obstacles. Unclear on the exact constraints, cause the audio just wasn't good enough for me to be able to get that from the interviewer.