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Q. |
Consider the following identities for regular expressions: (a) (r + s)* = (s + r)* (b) (r*)* = r* (c) (r* s*)* = (r + s)* Which of the above identities are true? |
A. | (a) and (b) only |
B. | (b) and (c) only |
C. | (c) and (a) only |
D. | (a), (b) and (c) |
Answer» D. (a), (b) and (c) |
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Theory of Computation and Compiler DesignNo comments yet