Question

Asked Dec 11, 2019

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what is -4 (negative 4) in a 2's complement of 8 bits?

Step 1

8-bit representation of a binary number is extremely useful and it is often called sign-magnitude representation of binary numbers. In this case, the left most bit is called the sign bit and it is used to represent whether the number is positive or negative. The remaining 7 bits are called magnitude bits and they represents the magnitude of the binary number. It is illustrated below for a 8-bit binary number B:

Step 2

So, the 8-bit binary representation of the number +4 will be as follows:

Step 3

Now, 1’s complement of a binary number can be obtained by replacing all the 1’s by 0’s and all the 0’s by 1’s. So, the 1’s complem...

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