Saurastra University 2006 B.Sc Information Technology Computer O'tion & Architecture - Question Paper

B. Sc. (IT) (Sem. IV) exam
April / May – 2006
Computer O'tion & Architecture
Time :
3
Hours] [Total Marks : 100

1 (a)
Write a note on programmed I/O mode of data eight
transfer ranging from I/O and processor.

OR

(a)
Draw block diagram of DMA controller. discuss eight
every block in brief.
(b)
Attempt any 2 : 12
(i)
discuss the stack organization in detail.
(ii)
discuss different I/O commands
(iii) Sketch and discuss the construction of magnetic
tape.
2
Attempt any 4 : 20

(a)
Distinguish between: Isolated I/O V/s Memory Mapped
I/O.
(b)
Construct a full adder using 2 half address.
(c)
Design and develop two bit binary counter.
(d)
Write note on Asynchronous data transfer.
(e)
Write a note on Auxillary Memory.
3 (a)
discuss bi-directional shift register with parallel eight
load in detail.

(b)
Draw the internal structure of CPU and discuss eight
the steps involved in execution of an instruction.
(c)
Convert into reverse polish notation. four
A*B/C – D+E
4
Write short notes on : (any five) 20

(a)
Associative Memory
(b)
Characteristic table and excitation table of J-K flip-flop.
(c)
De-Morgan’s legal regulations
(d)
LX4 decoder
(e)
General register organization
(f)
S-R flip-flop.
SP-1977]
1
[Contd..


5
(i) Attempt any 2 : 12

(a)
discuss various addressing modes.
(b)
Write a note on “Instruction Formats”. discuss the
factors to be taken in account for designing
instruction formats.
(c)
Simplify the boolean function in SOP and POS
form; using K’map.
F (A, B, C, D) =
.
(0, 1, 2, 6, 8, 9, 10)


(ii)
Attempt any 2 :
(a)
Write a short note on Universal Gate.
(b)
describe terms :
(i)
PLA (ii) IOP (iii) Risc (iv) Multiplexer
(iii) Draw the logic diagram and provide the truth
table for the subsequent Boolean expression:
'

F = xy + xy + y'z + x'z.

Earning:   Approval pending.