Microsoft Interview Question for Software Engineer in Tests






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Traditionally, character segmentation into words is done by a"greedy algorithm."The greedy algorithm involves the following : (1) Start from the beginning of the given sentence being processed and exhaust all the possible words that match the initial part of character string in the sentence.

(2) Pick the longest word (i. e., the word that has the largest number of characters) and put a space at the end of the matched sub string in the sentence, treat the remaining character string as a new sentence and repeat step (1) until all the characters in the sentence are processed.

The greedy algorithm does not always make the best choice from a global perspective. In fact, it may choose combinations that are not only not optimal but which are also not syntactically correct. As stated in T. Cormen et al."Introduction to Algorithms," p. 329 :"A greedy algorithm always makes the choice that looks best at the moment. That is, it makes a locally optimal choice in the hope that this choice will lead to a globally optimal solution.

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wipo.int/pctdb/en/wo.jsp?IA=WO2001048738&wo=2001048738&DISPLAY=DESC

- algooz April 27, 2008 | Flag Reply
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use maximum likelihood of partition + EM algorithm

- Anonymous January 01, 2009 | Flag Reply
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can use dynamic programming i guess

- Anonymous January 24, 2009 | Flag Reply
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1. Greedy is a nonstable but quick sln, and it might not find the best sln.
2. DP is a stable and good way to generate all possible word combinations. Cost is the time.(Or we can take shortcut to top DP once the find the first full match words sequnce).

- Anonymous August 27, 2009 | Flag Reply


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