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CS381-2003fa-prelim1

CS381-2003fa-prelim1 - CS381 Fall 2003 First Mid Term...

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CS381 First Mid Term Friday Oct 10, 2003 Fall 2003 Olin 255 9:05-9:55 This is a 50-minute in class closed book exam. All questions are straightforward and you should have no trouble doing them. Please show all work and write legibly. Thank you. 1. Let L be the set of strings of 0’s and 1’s with an even number of 0’s. Strings with zero 0’s have an even number of 0’s. Write a regular expression for L. 2. Consider the set { } { } 2 2 010 1| 1 * 01 010 1| 1 *0*1 i i i i i i I Write down a string of length 19 in the set.
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