Write a program to reverse a string
Engineer Software Interview Questions
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How to calculate the depth of binary tree.
If you have a square room with no roof, and you had four flagpoles you had to plant on the walls so that each flagpole touched two walls, how would you do it?
Implement the Fibonacci sequence with O(n)
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Question level is not so difficult, its middle level and also tricky and programmatic.
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you have 100 doors in a row that are all initially closed. you make 100 passes by the doors starting with the first door every time. the first time through you visit every door and toggle the door (if the door is closed, you open it, if its open, you close it). the second time you only visit every 2nd door (door #2, #4, #6). the third time, every 3rd door (door #3, #6, #9), etc, until you only visit the 100th door.
A rotated sorted array (e.g. 34512), find the rotation count (in this case, 3 means rotated by 3).
Whiteboard programming: given a tile and a word, write a routine to determine if the word is valid. Wild card "*" might be present in tile and can be used for once when there is no match. For example, "bed" is valid given tile "abcdefg". "bread" is valid given tile "abcdefg*".
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