Time Limit: 90 Min.
Computer Architecture
Sessional I Total marks: 50
Q1
Explain how to determine if a number is negative or positive in the
following representation:
(a) Sign Magnitude
(b) Two’s Complement
Take same negative and positive numbers for both cases. The number
should be of 8-bit.
(10)
Q2
Given x=5 and y=-9, find the product P=x*y using Booth’s Algorithm.
Clearly mention each step. (10)
Q3
For the expression: Z= (A*B) + (C+D) + E
Write programs for One address machine and Three Address machine (5+5)
Q4
Name TWO Addressing modes that involve memory and give example of
each. (6)
Q5
Convert the decimal number (-76.00) to its IEEE single precision floating-
point counterpart. (3)
Q6
Convert the IEEE single-precision floating-point number (658900000) to its
decimal counterpart. (3)
Q7
A 40-MHz processor was used to execute a benchmark program with the
instruction mix and clock cycle count (shown in table below). Determine
the effective CPI, and execution time for this program.
(4+4)
Figure for Question 2
Table for Question 7
Instruction
type Instruction
count Clock cycle
count
Integer arithmetic 45000 1
Data transfer 32000 2
Floating point 12000 3
Control transfer 11000 2
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