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Data Structures Interview Questions

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Tries

A trie, or prefix tree, is an ordered tree data structure that is used to store an associative array where the keys are usually strings. Unlike a binary search tree, no node in the tree stores the key associated with that node; instead, its position in the tree defines the key it is associated with. All the descendants of a node have a common prefix of the string associated with that node, and the root is associated with the empty string. Values are normally not associated with every node, only with leaves and some inner nodes that correspond to keys of interest.

 

www.cs.nyu.edu/~melamed/courses/102/lectures/Tries.ppt 

 

www.cs.ust.hk/~huamin/COMP171/index.htm

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