Post Graduate Diploma- Post Graduate Diploma In Computer Applications (PGDCA) 1st Sem FUNDAMENTALS OF DIGITAL COMPUTER(Alagappa University, Karaikudi, Tamil Nadu-2011)
Wednesday, 24 July 2013 08:30Jebaprincy
First Semester
Computer Applications
FUNDAMENTALS OF DIGITAL COMPUTER
(Non-CBCS—2004 onwards)
Time : 3 Hours Maximum : 100 Marks
Part A (15 × 1 = 15)
Answer all questions.
1. What is a program ?
2. What is byte ?
3. What is ASCII ?
4. What is non-volatile memory ?
5. What is Register ?
6. Subtract the following Binary Numbers :– 10101 1010 – 10001 0011.
7. Write the switching postulates of Boolean Algebra.
8. Give the symbols for AND and OR Gates.
9. Define Bus.
10. What is Multi programming ?
11. What is Virtual Memory ?
12. What is DMA ?
13. Define the term “Source Program”.
14. What are the facilities provided by the OS ?
15. What are digital signal processors ?
Part B (5 × 5 = 25)
Answer all questions.
16. (a) Draw a block diagram of computer. Explain the function of each block.
(Or)
(b) Write a procedure to find the occurrence of a digit in the given sequence.
17. (a) What is the advantage of using Hexadecimal Numbers ?
(Or)
(b) Evaluate : (i) 11010 – 10111, (ii) 110 × 111.4 AFN-1255
18. (a) What is the difference between a Video graphic terminal and a Graph plotter ?
(Or)
(b) Explain the operation of a flip-flop. 19. (a) List the operation codes.
(Or)
(b) Show that X Y + X Z + X Y Z = X Y + X Z
20. (a) Explain how demand paging Algorithm works.
(Or)
(b) What do you understand by UNIX pipes ?
Part C (5 × 12 = 60)
Answer all questions.
21. (a) How will you represent integers and fractions ?
(Or)
(b) Explain input methods.
22. (a) Explain any two drives in detail.
(Or)
(b) How will you represent 2’s Complement Numbers ? Explain.
23. (a) Explain the canonical forms of Boolean Functions.
(Or)
(b) Explain the Memory Communication.
24. (a) Write about high level languages.
(Or)
(b) Why do we need operating system ? Write about any two operating systems.
25. (a) Write about the Evolution of Micro computers. (Or)
(b) Define Smart card. Classify the Generations of Computer
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