MCQOPTIONS
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| 1. |
Let P be a regular language and Q be context-free language such that Q ∈ P. (For example, let P be the language represented by the regular expression p*q* and Q be {pnqnn∈ N}). Then which of the following is ALWAYS regular? |
| A. | P ∩ Q |
| B. | P – Q |
| C. | ∑* – P |
| D. | ∑* – Q |
| Answer» D. ∑* – Q | |