Subject: Computer Officer Subjective 2080
Section: "A" 30 marks
1. With the help of a block diagram, explain the architecture of a computer system. Also, discuss
various components of a computer system together with their functions. 5+5
2. Write an algorithm to convert infix to postfix expression with example. 10
3. Elaborate a program in 'C' language to calculate the power of number using recursion. (Note: mth
power of a number n is equal to nm, where n is referred to as base and m is referred to as power.
Your program should ask for two numbers, m and n, calculate the value of nm using recursive
function and display the result.) 10
Section: "B" 20 marks
4. State Joint Application Development (JAD) with its purpose and philosophy. Explain the JAD
participants with their role in the application development. 4+6
5. Assume that you are hired as a systems analyst by a restaurant owner that wishes to develop an
information system for the restaurant. Various activities takes place in the restaurant to conduct its
business. The restaurant makes a sales forecast. It procures raw materials from vendors based on
the forecast and pays them. It receives orders and receives payments for the product and service
from the customers. It mobilizes employees to produce the product as per the order and pays them
salary/wages.
The context diagram is given to you, which is as shown in the diagram below. Now, as a system
analyst, based on the context diagram and the set of activities mentioned above, develop Level 1
DFD identifying sub processes, data flows and data stores for the proposed system. 10
Section: "C" 20 marks
6. What is scheduling? What criteria affect the scheduler's performance? Explain clearly. 2+8
7. Mention the importance of normalization in database. Also, explain about first normal form, second
normal form, and third normal form with the help of appropriate examples. 3+7
Section: "D" 30 marks
8. What is computer networking? Explain the functions, protocols and services of each layers of
TCP/IP model. Compare TCP/IP model with OSI model.
9. Describe web-based E-commerce architecture. What are the requirements of web-based E-
commerce?
10. a) Define and compare between MIS and EIS
b) Based on the Copyright Act, discuss the circumstances under which the copyrighted material can
be used without authorization.
-The End -
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