Java Regular Expressions MCQ Questions

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What is the purpose of the `group()` method in Java regular expressions?

A) It compiles a regular expression B) It checks if a string matches the pattern C) It returns the matched subsequence D) It counts the number of matches

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Answer & Solution

Answer: Option C

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In a regular expression, what does the metacharacter `w` represent?

A) Any special character B) Any word character (letter, digit, or underscore) C) Any lowercase letter D) None of These

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Answer & Solution

Answer: Option B

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Which method is used to append replacement text in a Java regular expression operation?

A) `replaceText()` B) `addReplacement()` C) `appendReplacement()` D) `appendText()`

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Answer & Solution

Answer: Option C

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In a regular expression, what does the metacharacter `b` represent?

A) A digit B) Any character C) Any special character D) A word boundary

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Answer & Solution

Answer: Option D

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What is the purpose of the `quote()` method in Java regular expressions?

A) It returns a literal pattern string for the specified string B) It quotes a matched subsequence C) It compiles a regular expression D) It checks if a string matches the pattern

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Answer & Solution

Answer: Option A

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In a regular expression, what does the metacharacter `Q` represent?

A) A digit B) A word boundary C) The end of a quoted section D) The beginning of a quoted section

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Answer & Solution

Answer: Option D

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Which class is used to represent a group of characters in a regular expression in Java?

A) `Group` B) `Matcher` C) `CharacterGroup` D) `Pattern`

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Answer & Solution

Answer: Option C

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In a regular expression, what does the metacharacter `A` represent?

A) A word boundary B) The beginning of a string C) A digit D) None of These

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Answer & Solution

Answer: Option B

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What is the purpose of the `reset()` method in Java regular expressions?

A) It counts the number of matches B) It checks if a string matches the pattern C) It resets the matcher D) It compiles a regular expression

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Answer & Solution

Answer: Option C

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In a regular expression, what does the metacharacter `G` represent?

A) The start of the next match B) A word boundary C) A digit D) The end of the previous match

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Answer & Solution

Answer: Option D

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