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Q.
Which of the following pairs of regular expressions are equivalent?

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MCQ
1. 
Which of the following languages is/are regular?
L1: {wxwR ? w, x ? {a, b}* and ?w?, ?x? >0} wR is the reverse of string w

L2: {anbm ?m ? n and m, n?0

L3: {apbqcr ? p, q, r ? 0}
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2.
Union of two languages L and M is written as?
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3.
Is an ordinary NFA and a NFA-? are equivalent
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4.
If a
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5.
You can use RE, if you expect the value of a property to change in an unpredictable way each time its run.
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