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

How do you trim whitespace from the beginning and end of a string in JavaScript?

A). string.trim()

B). trimString(string)

C). string.strip()

D). trim(string)

What is the result of 'Hello'.substring(0, 3) in JavaScript?

A). 'Hell'

B). 'Hello'

C). 'o'

D). 'llo'

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

A). Concatenates two or more strings

B). Compares two strings

C). Converts a string to lowercase

D). Finds a substring in a string

How do you convert a string to uppercase in JavaScript?

A). string.toUpperCase()

B). string.uppercase()

C). string.toUppercase()

D). string.upperCase()

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

A). string.length

B). string.size

C). string.length()

D). lengthOf(string)

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

A). Extracts characters between two indices

B). Trims whitespace from the beginning

C). Converts string to an array

D). Compares two strings

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)

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 .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

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

A). .includes()

B). .contains()

C). .hasSubstring()

D). .indexOf()