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Perl Compatible Regular Expressions Questions and Answers PDF Download
The Perl-compatible regex patterns are always ended by one particular character, which must be?
- Same as beginning and end
- Same at middle and end
- Different from beginning
- None of them
In Perl-compatible patterns any pattern that is followed by ? this means that
- Match this pattern 1 or more times
- Match this pattern exactly 1 time
- Match this pattern 0 times
- None of them
Why a special character is used in the beginning and the end of string in Perl-compatible patterns?
- Because it indicates the beginning and end of the pattern
- Because it indicates that it?s a integer string
- Because it indicates the literal
- It indicates nothing
All these functions are preg_quote ( ), preg_grep ( ), preg_split ( ), preg_match_all ( ) example of
- POSIX style regex
- Competent style regex
- Perl compatible style regex
- None of them
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