Alagappa University 2008 B.Tech Electronics and Communications Engineering M.C.A DIGITAL COMPUTER ORGANIZATION - Question Paper

ans any 5 ques..
All ques. carry equal marks.

1. (a) discuss how the hexadecimal number system is better than other number systems. (8 )

(b) Write a short notes on :
(i) Gray code
(ii) Excess – three code
(iii) ASCII. (12)

2. (a) define binary division operation with example. (8 )

(b) explain the role of complements in binary arithmetic. (12)

3. (a) State and prove De Morgan’s theorem. (10)

(b) explain Quine–McKiuskey method. (10)

4. (a) explain Multiplexer circuit with neat diagram. (10)

(b) discuss the function of Half-Adder. (10)

5. (a) define the importance and duty of ALU in a system. (10)

(b) define the role of full-adder in integer number representation. (10)

6. (a) discuss the Encoder and Decoder circuit with neat diagram. (10)

(b) Draw the circuit of Master-Slave flip flop and discuss. (10)

7. (a) discuss the BCD counter with neat diagram. (10)

(b) What is memory? How it is organized? (5)

(c) What is the duty of shift registers? (5)

8. (a) What is meant by instruction cycle and execution cycle? (8 )

(b) explain the duties of DMA and I/O processors with neat diagrams. (12)

Earning:   Approval pending.