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quiz1-spr10 - a a = 0 OUTPUT = puts “a ={a 1}” if a...

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CMSC330 Spring 2010 Quiz #1 Name Discussion Time (circle one): 9am 10am 11am 12pm 1pm 2pm Do not start this exam until you are told to do so! Instructions • You have 20 minutes for this quiz. • This is a closed book exam. No notes or other aids are allowed. • Answer essay questions concisely in 2-3 sentences. Longer answers are not needed. • For partial credit, show all of your work and clearly indicate your answers. • Write neatly. Credit cannot be given for illegible answers. 1. (6 pts) What is the output (if any) of the following Ruby program? Write FAIL if code does not compile or if executing the code throws a runtime exception.
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Unformatted text preview: a. a = 0 # OUTPUT = puts “a++ = #{a+1}” if a puts a b. b = [ 1, 2, 3 ] # OUTPUT = b.each { |c| puts c } c. if “route66” =~ /([^a-z]+)/ puts $1 # OUTPUT = puts $2 else puts “None” end 2. (6 pts) Construct a NFA for the regular expression x|y*. You must use the algorithm described in class for full credit. 3. (8 pts) Convert the following NFA into a DFA by applying the subset construction algorithm discussed in class. Be sure to list the NFA states represented by each DFA state. a 1 a ε ε 3 2 a ε 4...
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