Design a system to download/stream resources from the web, Invert the nodes of a binary tree, Design a filesystem, how would you search for files using this file system you designed in your language. Write a method to find words from a dictionary with wild cards, Determine if a binary tree is a binary search tree, How would you design a system to accept documents, etc to be approved by peers and then a manager.
Implement a stack using just queues
Programming question - Add spaces to a sentence given a sentence and dictionary. "iloveamazon" should return "i love amazon" for example.
String easy questions
Q: alien dictionary
Write a function to recursively reverse a string.
Find intersection of two unsorted arrays?
Normalization questions coding question: Program to find the element occurring odd number of times in an array Complexity
Return top 10 most used words in a string
Design a stack with min(stack) operation in constant time
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