Universal Science Academy
Universal Science Academy
Subject: Computer Science
Chapter no. Chapter no. 5 (2nd Half)Students Name:
____________________________
Teachers Name: Rana Muhammad IrfanTime Allowed: __________Test
no: 2Maximum Marks: 25
Part I (Objective)
Q. 1: Choose the best option:
(5 x 1= 5)1: 1s complement of a binary number can be taken
directly by:a: Replacing all 0s to 1sb: Subtraction
c: Multiplication d: By committing s to and 1s2: 1s complement
of 001001011is:
a: 0110100
b: 110110100
c: 000110100
d: 1100010003: In binary multiplication 1.0 =a: 1
b: -1
c: 0.1
d: None of these4: In fixed point representation of fixed point
representation position of what does not change?a: Decimal
b: 0s
c: 0s
d: All of These5: To represent a real number in a computer what
is used to represent sign of the number?a: MSD
b: LSD
c: Sign (+ve, -ve)
d: None of thesePart I (Short Questions)
Q. 2: Give the short answer to the following:
(6 x 2 =12) 1. What is a 1s complement give an example?
2. What is a 2,s complement also give an example?
3. What is a fix point number representation?
4. Represent -54(10) using 8 bit 1s complement
5. Subtract the following numbers.
110101011
_ 011110101
6. Multiply the following numbers
11100001
X 0101Part III (Long Questions)
Q.3: Write a detailed note on fixed point number
representation.
(8 x 1= 8)OR
Represent 46.475(10) in 16 bit fixed point representation a
detailed note on the role of computers in Education.
