Computer Science for IGCSE & O level - Data Representation (Section 15 - No. 45) | ExamPlay

Computer Science for IGCSE & O level - Data Representation (Section 15 - No. 45)

What is the decimal value of the 8-bit two's complement number 11111110?

-2

-1

254

2

解释

Inverting, adding one gets a 2, then since the first digit is 1, it's -2

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