These were all easy to answer. The coding part was leetcode and average difficulty: given a list of lists (A) and another list (B), return the items from any list within list A that coincide with list B but need to appear more twice or more (from A) that coincide with an item from list B but also points to itself (item A is same as item B). Something like that - you'd have to see the question but it's leetcode nonetheless.