Given an array of numbers from 1 to 100, where one of them is replaced with a 0, find the missing number. Given two strings, figure out if string B can be made using the characters in string A Some other array/string questions. Pretty easy on the technical front. What would you care about if designing a vending machine? i.e. design, functionality, etc.

Tell me about a time when you were wrong and how you resolved it.