Regular Expressions [Part 3] - Character Sets & Quantifiers

The video tutorial provides a comprehensive guide to regular expressions, covering meta characters, character sets using brackets, case sensitivity, ranges, quantifiers, grouping, and shorthand character classes. It explains how to use these elements to create effective regular expressions for various use cases, ensuring clarity and ease of reference.

Which meta character is used to indicate the start of a string in regular expressions?

• .

• ^

• *

• $

What does the character set [A&E] signify in a regular expression?

• Matches any character except A or E

• Matches any character

• Matches both A and E

• Matches either A or E

How can you make a character set case insensitive?

• Use the dot (.)

• Use a caret (^) inside the brackets

• Use a dollar sign ($)

• Add a case insensitive flag

What does the character set [^GF] mean?

• Matches only G and F

• Matches any character except G or F

• Matches any uppercase letter

• Matches G or F

Which of the following matches any uppercase letter?

• [0-9]

• [a-z]

• [^A-Z]

• [A-Z]

What does the quantifier {2} specify in a regular expression?

• At most 2 occurrences

• Between 2 and 4 occurrences

• Exactly 2 occurrences

• At least 2 occurrences

How would you specify a range of 2 to 4 occurrences using quantifiers?

• {2,4}

• {2;4}

• {2:4}

• {2-4}

What is the purpose of using parentheses in regular expressions?

• To match any character

• To group expressions

• To negate a character set

• To specify a range

Which shorthand character class matches any digit?

• \n

• \w

• \d

• \s

What does the shorthand character class \s match?

• Any digit

• Any non-word character

• Any word character

• Any whitespace character