What does parseFloat('12.34abc') return?
A). 12
B). 34
C). NaN
D). undefined
How do you format a number to two decimal places?
A). toFixed(2)
B). toExponential(2)
C). toPrecision(2)
D). toString(2)
Which method returns the primitive value of a Number object?
A). toString()
B). valueOf()
C). toFixed()
D). parseFloat()
What does Number.isNaN('123') return?
A). 1
B). 0
C). NaN
D). undefined
What does Number.isInteger(123.45) return?
A). 1
B). 0
C). NaN
D). undefined
What does Number('123') return?
A). 123
B). 123
C). NaN
D). 23
What does the method parseInt('10.5') return?
A). 5
B). 11
C). 10
D). NaN
What is the result of parseInt('0xF', 16)?
A). 15
B). 0
C). NaN
D). 16
Which method would you use to check if a value is a finite number?
A). isNaN()
B). isFinite()
C). Number()
D). toFixed()
What is the output of (255).toString(2)?
A). 255
B). 11111111
C). ff
D). 10