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The two digits hexadecimal number which has largest value is ___ which corresponds to _____

  • A.FE, 255 decimal
  • B.FF, 254 decimal
  • C.FF, 255 decimal
  • D.EF, 245 decimal

Answer: C

Correct answer: FF, 255 decimal

A hexadecimal digit runs from 0 to F, so the largest two-digit value is FF, and

\[ FF_{16} = 15\times 16 + 15 = 255 \]

That is the same as saying two hex digits hold one byte, whose range is 0 to 255.

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