Data Representation - Twos Compliment (GCSE Computing)

The following is a GCSE Computing test covering 'Data Representation - Twos Compliment'

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Question 1

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What decimal value does the 8-bit two`s complement 10000000 represent?

What is the 8-bit two`s complement representation of decimal -15?

What is the 8-bit two`s complement result of 01010101 + 11001101?

Adding 01111111 (127) and 00000001 (1) in 8-bit two`s complement produces:

What is the range of values representable with 8-bit two`s complement?

What is the 8-bit two`s complement representation of decimal -45?

Which 8-bit two`s complement binary represents decimal -128?

How can overflow be detected when adding two`s complement numbers?

How do you sign-extend an n-bit two`s complement number to more bits?

What is the 8-bit two`s complement result of 11110010 + 00001101?

What is the 8-bit two`s complement result of 00110010 - 00011110?

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