Planful Interview Question

Technical Round 2: 1> Tell me about yourself. 2> Time complexity problem. 3> A sorted array is given. return the array in the zigzag pattern. 4> Buy and sell the stock problem. 5> Given 2 sorted arrays. return the array combining both the arrays in sorted order. 6> What is paging? 7> What is virtualization? 8> What is the difference between interface, class and abstract class? 9> Do you have any questions for me?