Lession 3 Computer Organization And Architecture : MCA560

1. If (101.01)2=(x) 10, then what is the value of x?

1. If (101.a) 505.05

b) 10.101

c) 101.01

d) 5.25 01)2=(x) 10, then what is the value of x?

2. What are the mantissa and exponent required respectively to represent ‘5’
in binary floating point representation?

a) 011,0.110000

b) 0.110000,011

c) 011,0.101000

d) 0.101000,011

3. If the two numbers are to be multiplied, the mantissa are multiplied and the
exponents are added.

a) True

b) False

4. For a twos complement representation, the truncation error is %BLANLK% .

a) Always positive

b) Always negative

c) Zero

d) None of the mentioned

5. What is the smallest floating point number that can be represented using a
32-bit word?

a) 3*10-38

b) 2*10-38

c) 0.2*10-38

d) 0.3*10-38

6. The decimal numbers represented in the computer are called as floating
point numbers, as the decimal point floats through the number.

a) True

b) False

7. %BLANK% constitute the representation of the floating number.

a) Sign

b) Significant digits

c) Scale factor

d) All of the mentioned

8. The normalized representation of 0.0010110 * 2 9 is %BLANK%.

a) 0 10001000 0010110

b) 0 10000101 0110

c) 0 10101010 1110

d) 0 11110100 11100

9. In 32 bit representation the scale factor as a range of %BLANK%.

a) -128 to 127

b) -256 to 255

c) 0 to 255

d) None of the mentioned

10. In double precision format, the size of the mantissa is %BLANK%

a) 32 bit

b) 52 bit

c) 64 bit

d) 72 bit

11. The sign followed by the string of digits is called as %BLANK%

a) Significant

b) Determinant

c) Mantissa

d) Exponent

12. The 32 bit representation of the decimal number is called as %BLANK%

a) Double-precision

b) Single-precision

c) Extended format

d) none of the mentioned

13. Perform the subtraction with the following unsigned decimal numbers by
taking the 10's complement of the number to be subtracted.
a. 3270 - 1516 b. 1453 - 6750
c.30 - 120 d. 2100 - 230

14. Perform the subtraction with the following unsigned binary numbers by
taking the 2's complement of the number to be subtracted.
a. 1011010 – 001000 b. 101010 - 10101
c.100 - 110000 d. 1110100 - 1110100

15. Find the 10's complement of the following Five-digit decimal numbers:
a.13900 b. 08067
c. 11000 d. 00011.

16. A 32-bit floating-point binary number contains eight bits plus sign for the
exponent and 22 bits plus sign for the mantissa. The mantissa is a normalized
fraction. Numbers in the mantissa and exponent are in signed-magnitude
representation. What are the largest and smallest positive quantities that can
be represented, excluding zero?

17. Represent the number (+52.5), as a floating-point binary number with 26
bits. The normalized fraction mantissa has 18 bits and the exponent has 8
bits.