33. A billionth of a second is defined as a: A.millisecond B.microsecond C.nanosecond D.picoseconds E.None of the above
Option C Solution: Nanosecond : A nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second (or one billionth of a second), that is, 1/1,000,000,00011,000,000,000 of a second, or 10−9 seconds.
