Computer Organization Questions in Degree college lecturers

1. How many ‘1’s are there in the result produced by 8-bit 2’s complement addition of 29 and -46?

Ans: 7

2. Consider a hard disk containing 1000cylinders, 10 platters each with 2 recording surfaces and 63 sectors per track. What is the position of the sector whose 3-D disk address is <200,15,55> representing cylinder, surface, sector numbers respectively.

Ans: 253000

3. Consider implementation of a Boolean function of n variables using only one multiplexer and one inverter. the minimal size of multiplexer required is

Ans: 2^n-1 to 1

4. How many 64Kx1RAM chips are required to provide a memory of size 256K bytes?

Ans: 32

5. The number of full and half adders required to add 16- bit number is

Ans: . 1 half adder , 15 full adders

6. The micro-operation that performs division of a signed binary integer by 2 is ____

Ans: arithmetic shift right

7. When a cache memory is 30 times faster than main memory/RAM and cache hit ratio is 90%, the speed up gained using the cache is approximately ______

Ans: 27 times

8. The simplified SOP(Sum of Products) form of the boolean expression (P+Q'+R').(P+Q'+R).(P+Q+R') is
Ans: ( P + Q'. R')
9. Which of the following is NOT a method used for data transfer between peripherals and memory?
1. Programmed I/O
2. Pipelining
3. Direct Memory Access
4. Interrupt initiated I/O
 Ans: Pipelining