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

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

A). 'hello'

B). 'HELLO'

C). 'Hello'

D). 'hello'

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

A). '53'

B). 8

C). 53

D). '5 3'

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

A). 'Hell'

B). 'Hello'

C). 'o'

D). 'llo'

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

A). string.length

B). string.size

C). string.length()

D). lengthOf(string)

How do you check if a string starts with a specific substring in JavaScript?

A). string.startsWith(substring)

B). string.startsWithWith(substring)

C). string.beginsWith(substring)

D). string.starts(substring)

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

A). string.trim()

B). trimString(string)

C). string.strip()

D). trim(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()

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

A). +

B). -

C). *

D). /

How do you convert a string to uppercase in JavaScript?

A). string.toUpperCase()

B). string.uppercase()

C). string.toUppercase()

D). string.upperCase()