Q
What does '5' + undefined evaluate to in JavaScript?

Answer & Solution

Answer: Option A
Solution:
JavaScript converts undefined to the string 'undefined' and concatenates it with '5', resulting in '5undefined'.
Related Questions on Average

What will be the output of 5 + 3 + ' apples' in JavaScript?

A). '8 apples'

B). 8 apples

C). '5 + 3 apples'

D). '53 apples'

What is the result of 5 + 3 in JavaScript?

A). 8

B). 53

C). '8'

D). 15

How do you add a number and a string in JavaScript to get a numeric result?

A). parseInt(string, 10) + number

B). Number(string) + number

C). string + number

D). number + string

What will be the output of 'apple' + null in JavaScript?

A). 'applenull'

B). 'apple'

C). 'null'

D). 'appl'

What does 'apple' + 5 evaluate to in JavaScript?

A). 'apple5'

B). 10

C). 'apple10'

D). '5apple'

How do you concatenate multiple strings and a number in JavaScript?

A). Using the + operator

B). Using the concat() method

C). Using the join() method

D). Using the combine() method

What is the result of '5' + '3' + 2 in JavaScript?

A). '532'

B). '8'

C). '5'

D). '53'

What does '5' + '3' evaluate to in JavaScript?

A). '53'

B). 8

C). 53

D). '8'

How does JavaScript handle the expression 5 + '3'?

A). Converts 5 to a string and concatenates

B). Converts '3' to a number and adds

C). Throws an error

D). Converts '5' to a number and adds

How do you convert a string to a number in JavaScript using the + operator?

A).

B).

C). *string

D). /string