# Question 18 when using full sbtractor circuit if in a

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Question 18When using Full-Sbtractor circuit, if in a particular digit position (column) theMinuend’s bit is 1, the Subtradend's bit is 1 and the Borrow-in bit is 1, theDifference and Borrow-out bits are respectively:a) 0,0b) 0,1c) 1,0d)1,1
Question 19A computer has a word length of 8 bits (including sign). If 2’s complement isused to represent negative numbers. What range of numbers can be storedin the computer? If 1’s complement is used?
Question 20
The figure above depicts the binary subtraction 1101001 – 110110. If each birepresents the valueof borrow in (1 if borrow required or 0 if borrow not required) for the respective column. Whatare the values of the borrow b6, b5, b4, b3, b2and b1?
Question 21Suppose that A=101010 and B=011101 are treated first as 1’s complement numbers and performthe following operations:a) A + B and b) A – BNow suppose that the given numbers A and B are treated as a 2’s complements and theoperations a) and b) are performed in 2’s complement. Regarding overflow in the operationswhich one of the statements is true? You may choose multiple anwers.
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