How do you get the index of the first occurrence of a specified 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()

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

A). +

B). -

C). *

D). /

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

A). 'Hell'

B). 'Hello'

C). 'o'

D). 'llo'

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

A). 'hello'

B). 'HELLO'

C). 'Hello'

D). 'hello'

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

A). 'p'

B). 'l'

C). 'a'

D). 'pp'

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

A). '53'

B). 8

C). 53

D). '5 3'

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 .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 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)