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Exam 101-400 All Questions

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Exam 101-400 topic 3 question 23 discussion

Actual exam question from LPI's 101-400
Question #: 23
Topic #: 3
[All 101-400 Questions]

What does the ? symbol within regular expressions represent?

  • A. Match the preceding qualifier one or more times.
  • B. Match the preceding qualifier zero or more times.
  • C. Match the preceding qualifier zero or one times.
  • D. Match a literal ? character.
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Suggested Answer: C 🗳️

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DuboisNicolasDuclair
1 year, 4 months ago
Selected Answer: C
The ? symbol within regular expressions represents: C. Match the preceding qualifier zero or one time. In regular expressions, the `?` is used to indicate that the preceding character or group is optional, meaning it can appear zero times or once. It allows for matching either a single occurrence or none at all of the preceding element.
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ignasi
3 years, 4 months ago
regular expression ? means exactly one occurrence, extended regular expression means zero or one
upvoted 3 times
aries_jamie
2 years, 11 months ago
agree with you. * matches up zero or more times the preceding character per documentation.
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