Decimal from hex FF – UGC NET Question

The 8-bit pattern 11111111₂ can be grouped into two nibbles: 1111₂ and 1111₂. Each nibble corresponds to the hex digit F (decimal 15). Combining them gives FF₁₆. Therefore, 11111111₂ maps to FF₁₆.

Option A:
Option A correctly uses nibble-to-hex mapping: 1111₂ = F, so 11111111₂ = FF₁₆.

Option B:
Option B, FE₁₆, would correspond to 11111110₂ and thus to decimal 254, one less than the maximum.

Option C:
Option C, F0₁₆, corresponds to 11110000₂, which is decimal 240 and not the full 8-bit maximum.

Option D:
Option D, 0F₁₆, corresponds to 00001111₂, a value much smaller than 11111111₂.