Discussion
Arrange the following measures according to their Bytes contained in them :
(i) Exabyte
(ii) Yottabyte
(iii) Zettabyte
(iv) Petabyte
Answer: D
In increasing order of size: (iv) (i) (iii) (ii).
\[ \begin{aligned} \text{Petabyte} &= 10^{15}\ \text{bytes} \\ \text{Exabyte} &= 10^{18}\ \text{bytes} \\ \text{Zettabyte} &= 10^{21}\ \text{bytes} \\ \text{Yottabyte} &= 10^{24}\ \text{bytes} \end{aligned} \]
Each unit is a thousand times the one before (or 1024 times in the binary convention): peta, exa, zetta, yotta. The other options put the exabyte before the petabyte or the yottabyte before the zettabyte.
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