Which regular expression matches a string containing "ab" followed by any number of occurrences of "a" or "b"?Options :(ab)+(a+b)*ab(a|b)*ab(a|b)+none
Question
Which regular expression matches a string containing "ab" followed by any number of occurrences of "a" or "b"?
Options : (ab)+(a+b)* ab(a|b)* ab(a|b)+ none
Solution
The regular expression that matches a string containing "ab" followed by any number of occurrences of "a" or "b" is "ab(a|b)*".
Here's the step by step explanation:
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"ab" : This part of the regular expression matches the string "ab".
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"(a|b)" : This part of the regular expression matches any number of occurrences of "a" or "b". The "|" symbol is a logical OR operator, meaning it matches either "a" or "b". The "" symbol means "zero or more occurrences".
So, together "ab(a|b)*" matches a string that starts with "ab" and is followed by any number of "a"s or "b"s (including none).
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