doubt in generics- K&B book

Hi,

How this works?

Given a properly prepared String array containing five elements, which
range of results could a proper invocation of Arrays.binarySearch()
produce?
A. 0 through 4
B. 0 through 5
C. -1 through 4
D. -1 through 5
E. -5 through 4
F. -5 through 5
G. -6 through 4
H. -6 through 5

Answer: G, may i know what is inverted and then decremented.(as it was
explained in the answers part of self test)

samura

I think below link will clear your doubt. Refer it.

here