Regular expression,RegExp object,metacharacters

What is a regular expression?

• A sequence of characters that defines a search pattern

• A function in JavaScript

• A mathematical equation

• A programming language

Which object in JavaScript is used to work with regular expressions?

• String

• Array

• RegExp

• Object

What is the purpose of using regular expressions?

• To manipulate HTML elements

• To perform pattern matching and search operations on strings

• To create animations

• To handle user input in forms

Which method is used to test a regular expression against a string in JavaScript?

• *

• +

• .

• ?

What does the metacharacter '^' signify in a regular expression pattern?

• It matches the end of a string

• It matches the start of a string

• It matches any character

• It repeats the previous character zero or more times

Which modifier is used in JavaScript to perform a case-insensitive search?

• i

• g

• m

• s

What does the metacharacter '$' signify in a regular expression pattern?

• It matches the start of a string

• It matches the end of a string

• It matches any character

• It repeats the previous character zero or more times

Which method is used to replace text in a string using a regular expression in JavaScript?

• replace()

• split()

• concat()

• join()

Which metacharacter is used to match a digit character in a regular expression?

• \d

• \w

• \s

• \b

What does the metacharacter '|' signify in a regular expression pattern?

• It matches the start of a string

• It matches any character

• It specifies alternatives

• It matches the end of a string