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UNIX-LINUX QUESTION Explain the meaning of the following regular expressions: Question-1: '^([a-z])1' Question-2: '^.*([a-z]*).*1.*1'

UNIX-LINUX QUESTION Explain the meaning of the following regular expressions:

Question-1: '^\([a-z]\)\1'

Question-2: '^.*\([a-z]*\).*\1.*\1'

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