How do you concatenate two strings in JavaScript?
A). string1.concat(string2)
B). string1 + string2
C). string1.join(string2)
D). string1.combine(string2)
What will be the output of 'apple' + null in JavaScript?
A). 'applenull'
B). 'apple'
C). 'null'
D). 'appl'
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 does JavaScript handle the expression 5 + undefined?
A). Converts undefined to NaN and returns NaN
B). Converts 5 to a string and concatenates
C). Throws an error
D). Converts 5 to undefined and returns undefined
What does 'apple' + 5 evaluate to in JavaScript?
A). 'apple5'
B). 10
C). 'apple10'
D). '5apple'
How do you convert a string to a number in JavaScript before adding it to another number?
A). Number(string)
B). parseInt(string, 10)
C). string.toNumber()
D). string.convertToNumber()
How do you convert a string to a number in JavaScript using the + operator?
A).
B).
C). *string
D). /string
What is the result of '5' + true in JavaScript?
A). '5true'
B). '6'
C). 6
D). 'true5'
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 string result?
A). string + number.toString()
B). string + number
C). string + Number(number)
D). number + string