How do you get the index of the first occurrence of a specified substring in a string?

Which method can you use to check if a string includes a specific substring in JavaScript?

A). .includes()

B). .contains()

C). .hasSubstring()

D). .indexOf()

What does the .replace() method do in JavaScript?

A). Replaces a specified value with another value

B). Removes a substring

C). Splits a string into an array

D). Joins two or more strings

How do you find the length of a string in JavaScript?

A). string.length

B). string.size

C). string.length()

D). lengthOf(string)

Which operator can be used to combine a string with a number in JavaScript?

A). +

B). -

C). *

D). /

What is the result of 'hello'.toUpperCase().toLowerCase() in JavaScript?

A). 'hello'

B). 'HELLO'

C). 'Hello'

D). 'hello'

How do you concatenate two strings in JavaScript?

A). string1.concat(string2)

B). string1 + string2

C). string1.join(string2)

D). string1.combine(string2)

How do you extract parts of a string and join them together in JavaScript?

A). string.slice(start, end)

B). string.extract(start, end)

C). string.split(start, end)

D). string.join(start, end)

What does the + operator do with strings?

A). Concatenates strings

B). Compares strings

C). Trims strings

D). Converts strings to uppercase

How do you extract a part of a string and replace it with another substring in JavaScript?

A). string.replace(oldSubstring, newSubstring)

B). string.extractReplace(old, new)

C). string.modify(old, new)

D). string.substitute(old, new)

What does the .toLowerCase() method do in JavaScript?

A). Converts all characters to lowercase

B). Converts all characters to uppercase

C). Trims leading and trailing whitespace

D). Converts string to a boolean