UGC NET CS 2005 june-paper-2
October 3, 2023Relational-Algebra
October 3, 2023Theory-of-Computation
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Question 1
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Which one of the following regular expressions is NOT equivalent to the regular expression (a + b + c)*?
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(a* + b* + c*)*
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(a*b*c*)*
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((ab)* + c*)*
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(a*b* + c*)*
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Question 1 Explanation:
With the given r.e. (a+b+c)* we can generate “a”.
From option ‘c’ we cannot be able to create a without b. So option is not equivalent.
From option ‘c’ we cannot be able to create a without b. So option is not equivalent.
Correct Answer: C
Question 1 Explanation:
With the given r.e. (a+b+c)* we can generate “a”.
From option ‘c’ we cannot be able to create a without b. So option is not equivalent.
From option ‘c’ we cannot be able to create a without b. So option is not equivalent.
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