試題詳解

2.If you have a disk that has a capacity of Petabyte (PB), that is equal to
(A) 2 to the 20th power of bytes
(B) 2 to the 30th power of bytes
(C) 2 to the 40th power of bytes
(D) 2 to the 50th power of bytes
(E) 2 to the 60th power of bytes