Balanced Parenthesis Regular Expression
3 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does the [^()] character class match?

  • Any character that is a left or right parenthesis
  • Any character that is not a left or right parenthesis (correct)
  • Any character that is a left parenthesis
  • Any character that is a right parenthesis
  • What does the * symbol after the character class specify?

  • That the character class can be matched one or more times
  • That the character class can be matched zero or more times (correct)
  • That the character class can be matched exactly once
  • That the character class can be matched exactly twice
  • What should this regular expression be able to do correctly?

  • Match any input string that contains properly balanced parenthesis (correct)
  • Fail to match any input string that contains unbalanced parenthesis
  • Match any input string that contains improperly balanced parenthesis
  • Fail to match any input string that contains properly balanced parenthesis
  • Study Notes

    • The regular expression uses a combination of positive and negative lookahead assertions to ensure that for every left parenthesis (, there is a corresponding right parenthesis ), and vice versa.
    • The [^()] character class matches any character that is not a left or right parenthesis.
    • The * symbol after the character class specifies that the character class can be matched zero or more times.
    • The ( and ) sequences match literal left and right parenthesis, respectively.
    • The ( and ) symbols around the character class and the literal parenthesis sequences form a capture group.
    • The * symbol after the capture group specifies that the capture group can be matched zero or more times.
    • This regular expression should be able to correctly match any input string that contains properly balanced parenthesis, and it should fail to match any input string that contains unbalanced parenthesis.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Test your knowledge of regular expressions and their use in matching strings with balanced parenthesis. This quiz covers the use of lookahead assertions, character classes, literal sequences, and capture groups in regular expressions.

    More Like This

    Python Regular Expressions Quiz
    5 questions

    Python Regular Expressions Quiz

    AffirmativeTourmaline avatar
    AffirmativeTourmaline
    Regular Expressions Matching Quiz
    12 questions
    Regular Expressions Basics
    5 questions
    Use Quizgecko on...
    Browser
    Browser