Peritus.ai interview questions

The interview is mostly around data structures and algorithms and almost nothing on machine learning. I don't know why the questions I had posted before got taken down but here they are again. Q.1) What is the difference between a binary tree and binary search tree? Q.2) What is the time complexity to do a insertion and deletion operation in a binary search tree? Q.3) What is the difference between threads and processes? Are they different? Q.4) What are heaps? Q.5) Given a list [2,1,3,4,5,6] what is the fastest sorting algorithm you can use to sort it?

People here do not know what to ask from Machine Learning Guy. So they ask for Data Structures like Binary Tree and all from basic sites. No Creative Questioning Only Theoretical.