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MCQ 21: Which PHP function treats a string as collection of characters rather than a sequence?

  1. strspn ( )
  2. strcspn ( )
  3. count_chars
  4. All of them

MCQ 22: By using special wildcards for matching a string which function is used?

  1. Strtok
  2. Tokenizing
  3. Delimiter
  4. Regex

MCQ 23: In Perl-compatible patterns any pattern that is followed by ? this means that:

  1. Match this pattern 1 or more times
  2. Match this pattern exactly 1 time
  3. Match this pattern 0 times
  4. None of them

MCQ 24: What is the meaning of . in POSIX style regex?

  1. Matches any character of a string
  2. Matches the beginning of a string
  3. Matches the end of a string
  4. None of them

MCQ 25: Why a special character is used in the beginning and the end of string in Perl-compatible patterns?

  1. Because it indicates the beginning and end of the pattern
  2. Because it indicates that it?s a integer string
  3. Because it indicates the literal
  4. It indicates nothing

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