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

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

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

A). string.indexOf(substring)

B). string.index(substring)

C). substring.positionIn(string)

D). string.search(substring)

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 + operator do with strings?

A). Concatenates strings

B). Compares strings

C). Trims strings

D). Converts strings to uppercase

What is the result of '5' + 3 in JavaScript?

A). '53'

B). 8

C). 53

D). '5 3'

How do you convert a string to uppercase in JavaScript?

A). string.toUpperCase()

B). string.uppercase()

C). string.toUppercase()

D). string.upperCase()

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

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

What is the result of 'apple'.charAt(2) in JavaScript?

A). 'p'

B). 'l'

C). 'a'

D). 'pp'

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

A). .includes()

B). .contains()

C). .hasSubstring()

D). .indexOf()