Inteviewed for IC3 team but the interviewer had really poor headphones on and I couldn't make out most of the stuff he said/asked. Got one question asked on codility which was how to merge k sorted arrays. I really messed up the code as without having access to IDE, the code for priority queue based comparator implementation didn't work for me and the interviewer helped a lot graciously but the headphone issue didn't help with the matter.

Given N sorted arrays, write a code to merge them into one sorted array.