Andhra University 2005 M.C.A COMPUTER ORGANIZATION - Question Paper

2005 Andhra University M.C.A Computer Applications COMPUTER ORGANIZATION ques. paper

2004-05 MODEL PAPER

MCA 1.1.2 COMPUTER ORGANIZATION

First ques. is Compulsory

ans any 4 from the remaining

ans all parts of any ques. at 1 place.

Time: three Hrs.
Max. Marks: 100

1. (a) What is the difference ranging from Combinational Logic and Sequential Logic?
(b) What is the t ype of control unit in 8085 Microprocessor?
(c) What is the data transfer rate of PCI bus?
(d) Distinguish ranging from microinstruction and nanoinstruction
(e) What is IEEE 754?
(f) What is the difference ranging from real memory and virtual memory?
(g) What do you understand by internal interrupt?

2. (a) Verify whether the expression provided beneath is valid using algebraic method only. ab' + bc' + ca' = a'b + b'c + c'a]
(b) Design a 2 bit comparator that compares 2 2-bit values in whole, rather than 1 bit at a time. The circuit has inputs X1X0 and Y1Y0 , and outputs X > Y, X = Y, and X < Y

3. (a) Show the hardware including logic gates for the control function that implements the RTL statement xy1T0+T1+x1yT2 : A ? A+1
(b) Write 8085 assembly language program to compute the Fibonacci value f(n), where f(0) = f(1) = one and f(n) = f(n-1) + f(n-2) for n > one presume that n > one and the outcome will be less than 256

4. (a) define the mechanism of an instruction fetching, decoding and execution using flow chart?
(b) define the major hardware functional units of 8085 microprocessor with a neat complete functional block diagram.

5. (a) Show how 9 bit micro operation field in a micro instruction can be divided into sub fields? discuss with an example.
(b) elaborate the functions performed by an I/O interface? discuss with an example.

6. (a) Compare and contrast isolated I/O and memory mapped I/O.
(b) Why does I/O interrupt make more efficient use of the CPU?

7. (a) discuss the need of the memory hierarchy?
(b) What is the associate memory and what type of operation it is more suitable?

8. Write short notes on
(i) Signed Notation in Computer Arithmetic (ii) Instruction formats (iii) DMA (iv) VHDL

Earning:   Approval pending.