Answer & Solution
Answer: Option A
Solution:
The isFinite() function checks if a value is a finite number. isFinite(123) returns true because 123 is a finite number.
Q
What does isFinite(123) return?
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What is the output of (255).toString(2)?
A). 255
B). 11111111
C). ff
D). 10
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A). 15
B). 0
C). NaN
D). 16
What does parseFloat('12.34abc') return?
A). 12
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What does Number.isInteger(123.45) return?
A). 1
B). 0
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D). undefined
What does Number.isNaN('123') return?
A). 1
B). 0
C). NaN
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What does parseInt('101', 2) return?
A). 5
B). 101
C). NaN
D). 2
What does the method parseInt('10.5') return?
A). 5
B). 11
C). 10
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What does (123.456).toFixed(1) return?
A). 4
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D). 123
How do you format a number to two decimal places?
A). toFixed(2)
B). toExponential(2)
C). toPrecision(2)
D). toString(2)
What does Number('123abc') return?
A). 123
B). NaN
C). 123abc
D). undefined