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.