What does Number.isInteger(123.45) return?
A). 1
B). 0
C). NaN
D). undefined
Which method returns the primitive value of a Number object?
A). toString()
B). valueOf()
C). toFixed()
D). parseFloat()
What is the output of (255).toString(2)?
A). 255
B). 11111111
C). ff
D). 10
What is the result of isNaN('Hello')?
A). 1
B). 0
C). NaN
D). undefined
What does the method parseInt('10.5') return?
A). 5
B). 11
C). 10
D). NaN
What does Number('123') return?
A). 123
B). 123
C). NaN
D). 23
Which method converts a number to a string?
A). toFixed()
B). toString()
C). valueOf()
D). parseFloat()
What does parseFloat('12.34abc') return?
A). 12
B). 34
C). NaN
D). undefined
What does Number('123abc') return?
A). 123
B). NaN
C). 123abc
D). undefined
What does isFinite(123) return?
A). 1
B). 0
C). NaN
D). undefined