Q.

Let L={w \in (0 + 1)*|w has even number of 1s}, i.e. L is the set of all bit strings with even number of 1s. Which one of the regular expression below represents L?

A. (0*10*1)*
B. 0*(10*10*)*
C. 0*(10*1*)*0*
D. 0*1(10*1)*10*
Answer» B. 0*(10*10*)*
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