Amazon Software Engineer interview questions

Question 1 / 4 (Repeat characters in a string) You are given a function findRepeatCharacters which takes in a string s. Complete the function to print the repeating characters in a string in lexicographical order. (one-per-line) Question 2 / 4 (Rotate an array) Write a progam to rotate a matrix by 90 degrees clockwise. You should write complete code (including headers). Read the input from standard input (STDIN) and print the output to standard output (STDOUT). Question 3 / 4 (Nth largest node in a BST) Given a binary search tree (BST), return the Nth largest node. The function nLargeBST takes the root of the BST and N as parameters Question 4 / 4 (Binary Search Tree to Sorted Doubly Linked List) Write a program to convert binary search tree in to sorted doubly linked list, Inplace. Given pointer to head of binary tree