Core Java Programming Course- Character Classes in RegEx (regular expressions)

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Information Technology (IT), Architecture
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University
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which character class in regex is used to represent any single digit?
\D
\s
\d
\w
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In Java, why might you encounter an error when using \d in a regex pattern?
Because \d is a quantifier
Because \d represents a word character
Because \d is used for whitespace
Because \d is not a valid escape sequence in Java
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the quantifier {3} signify in a regex pattern?
Match at most 3 occurrences of the preceding character
Match any number of occurrences of the preceding character
Match at least 3 occurrences of the preceding character
Match exactly 3 occurrences of the preceding character
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a valid use of quantifiers in regex?
Matching a specific number of characters
Matching a range of characters
Matching any number of characters
Matching only special characters
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How would you represent a phone number pattern that starts with 678 followed by any 7 digits?
\d{10}
678\d{7}
678\w{7}
\d{3}678\d{4}
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which regex pattern would match a password starting with 2 to 6 word characters followed by exactly 2 special characters?
\w{2,6}\d{2}
\s{2,6}\W{2}
\d{2,6}\W{2}
\w{2,6}\W{2}
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the \W character class represent in regex?
Any non-word character
Any word character
Any digit
Any whitespace character
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