Java Regular Expressions MCQ Questions

1

What is a regular expression in Java?

A) A pattern that describes a set of strings B) A Java class for reading regular expressions C) A Java method for creating strings D) A Java package for file operations

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

2

Which class is used to compile a regular expression in Java?

A) `String` B) `Regex` C) `Matcher` D) `Pattern`

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

3

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

A) A digit B) A space C) Any character D) A word

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

4

What does the character class `[A-Za-z]` match in a regular expression?

A) Any special character B) Any uppercase or lowercase letter C) Any whitespace character D) None of These

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

5

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

A) A fixed number of occurrences of the preceding character or group B) One or more occurrences of the preceding character or group C) Zero or more occurrences of the preceding character or group D) Exactly one occurrence of the preceding character or group

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

6

Which quantifier is used in a regular expression to match one or more occurrences of the preceding character or group?

A) `*` B) `?` C) `{}` D) `+`

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

7

In a regular expression, what does the metacharacter `^` represent when used at the beginning of a pattern?

A) The start of a line B) The end of a line C) Any character D) A space

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

8

Which class is used to perform matching operations with regular expressions in Java?

A) `String` B) `Regex` C) `Pattern` D) `Matcher`

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

9

In a regular expression, what does the metacharacter `$` represent when used at the end of a pattern?

A) The start of a line B) Any character C) The end of a line D) A digit

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

10

What does the character class `[0-9]` match in a regular expression?

A) Any lowercase letter B) Any digit C) Any special character D) None of These

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board