Mahatma Gandhi University (MGU) 2010-1st Sem M.C.A , ,,,DIGITAL SYSTEM AND COMPUTER HARDWARE (2007 Admission onwards) - Question Paper

MAHATMA GANDHI UNIVERSITY
M.C.A. DEGREE EXAMINATION, JUNE 2010
First Semester
DIGITAL SYSTEM AND COMPUTER HARDWARE
(2007 Admission onwards)
Time: 3 Hours Maximum: 75 Marks
Part A
ans any ten questions, every ques. carries 3 marks.
1. Perform subsequent subtraction using 2s complement method
(a) 01100-01001 (b) 0011.1001-0001.1110
2. Encode the subsequent decimal numbers into excess three code.
(a) 327.89 (b) 20.305
3. define the concept of Hamming code.
4. Realize an AND gate from EXNOR gate.
5. Solve the subsequent expressions using Boolean Algebraic theorem:-
(a) ~ABC+A~BC+AB~C+ABC
(b) AB+~AB+~A~B
6. discuss the working of a parity checker.
7. What is meant by Race around condition of a flip-flop?
8. Write a note on dynamic shift register.
9. discuss the term POST.
10. elaborate the functions of BIOS RAM?
11. explain on Zip drives.
12. describe the terms head, track, sector with reference to a disk.
[10*3=30 Marks]
Part B
ans 1 full ques. from unit...
every ques. carries nine marks.
13. (a) discuss different binary codes used in digital system, with the help of examples. provide a compression of them.
[6+3=9 Marks]
Or
(b) Convert the decimal number 258.763 to (i) binary (ii) octal (iii) hexadecimal (iv) base 7.
[9 Marks]
14. (a) Demonstrate pulsed operation of a three input AND gate with the help of truth table and waveforms. [9 Marks]
Or
(b) Draw the circuit and discuss a comparator that compares 2 bit binary numbers [6 Marks]
(c) Write a note on parallel binary address. [3 Marks]
15. (a) Draw the circuit, logic diagram and waveforms for a 4-bit, right shift register using JK flip-flops.
[9 Marks]
Or
(b) What is the function of a buffer register? [2 Marks]
(c) Draw the logic diagram and timing characteristics of a bidirectional shift register.
[3+4=7 Marks]
16. (a) discuss the system boot sequence. [3 Marks]
(b) define the working of a computer scanner. [6 Marks]
Or
(c) What is meant by a chip set? [2 Marks]
(d) Write down the basic functional block diagram of a mother board. Show different parts in mother board.
[4+3=7 Marks]
17. (a) discuss with the help of figures, the load actuator mechanism of hard disk drive. [9 Marks]
Or
(b) How the spindle motor protects a stable turning power of hard disk drive. [6 Marks]
(c) Write a note on USB. [3 Marks]

Earning:   Approval pending.