Computer Architecture Multiple choice Questions and Answers-Digital Data Representation

31.	2’s complement is used to represent signed integers, especially __________ integers.
a.	Negative
b.	Positive
c.	Both a and b
d.	None of the above

Answer: (a).Negative

32.	In ___________________, to encode a negative number, first the binary representation of its magnitude is taken, complement each bit and then add 1.
a.	Signed integer representation
b.	1’s complement representation
c.	2’s complement representation
d.	Radix complement representation

Answer: (c).2’s complement representation

33.	Which one of the following is the type of complement for each base R system?
a.	Diminished radix-complement representation [(R – 1)’s complement]
b.	Radix- complement representation [R’s complement]
c.	1’s and 2’s complement representation
d.	Both a and b

Answer: (d).Both a and b

34.	For subtraction of binary number, subtract the _________________.
a.	Minuend from the subtrahend digit
b.	Subtrahend digit from the minuend
c.	MSB from the LSB
d.	None of the above

Answer: (b).Subtrahend digit from the minuend

35.	Which of the following condition is true for determining overflow condition in 2’s complement?
a.	When adding two positive numbers gives a negative result or when two negatives give a positive result.
b.	If sign bit (MSB) of result and sign bit of two operands are of different signs.
c.	The ‘1’ in the MSB position indicates a negative number after adding two positive numbers.
d.	All of the above

Answer: (d).All of the above

36.	What does the leftmost bit represents, according to the IEEE standards?
a.	Sign of the number
b.	Position of the number
c.	Weight of the number
d.	None of the above

Answer: (a).Sign of the number

37.	Floating-point numbers are those numbers, which include ______________.
a.	Decimals
b.	Fractional parts
c.	Integer values
d.	All of the above

Answer: (d).All of the above

38.	The binary representation of 0.875 is 0 01111110 11000000000000000000000 in _______________presentation.
a.	128- bit
b.	Excess 127
c.	32- bit
d.	16-bit

Answer: (c).32- bit

Answer: (b).Straight binary code

40.	In straight binary code, N-bits or N binary digits can represent ______________ different values.
a.	2^N
b.	2^(N+1)
c.	2^(N-1)
d.	2^N -1

Answer: (a).2^N