Computer Science CSS Paper 2008

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS
IN BPS – 17 UNDER THE FEDERAL GOVERNMENT, 2008.
COMPUTER SCIENCE
TIME ALLOWED: THREE HOURS MAXIMUM MARKS:100

Attempt ONLY FOUR question from PART II selecting at least ONE question from each SECTION.

SECTION I
Q2. (a) Compare the TCP/IP and OSI network and describe the functionality of at least two Transport and two network layer protocols
(b)Differentiate between the message switching and packet switching. Which one is better for data networks?
(c)Describe various network Flow control protocol

Q3 (a)Differentiate between thread and process.Explain your answer through example
(b)Various operating systems((i.e WIN 2K,solaris) make use of pages virtual memory technique. Explain the paged virtual memory in general terms with the help of diagram

Q4 (a)Differentiate between interrupt and trap?Explain two approaches that can be taken to deal with multiple interrupt?
(b)Differentiate between the Shortest process next (SPN) and shortest remaining Time (SRT) Uni processor scheduling techniques?

SECTION II

Q5(a)What are view and how they are defined in SQL? Describe the rules pertaining to data updating through views
(b)Describe the process of Normalization and various Normal forms through examples.Also describe two integrity rule

Q6(a)Differentiate between Incremental and RAD models?Which one is better and why?
(b)Giving reasons for your answer based on the type pf system being developed. Suggest the most appropriate generic software process model,which might be used as a basis for managing the development of the following systems.
(i) A Virtual reality system to support software development
(ii) An interactive railway timetable system
(iii) A system to control Anti-lock breaking in a car
(iv) MSN messenger
Support your answer with necessary reasons. Clearly write down the assumptions you made.

SECTION –III

Q7 (a) Write note on various internal sorting algorithms. Develop the merge sort algorithm and develop the pseudo code for its implementation.
(b) Write a note on the following data structures:
(i) STACK (ii) QUEUE (iii) DE-QUEUE
Also describe various functions that can be performed on t hem and write the C++ code for implementation of these functions.

Q8 (a) In the context of computer Graphics, describe various 2D and 3D Transformations. Also write a note on Color Theory in this Context.
(b) What is an Expert System? Describe the various methods for knowledge representation.
(c) Develop the C++ code to accomplish the following tasks:
(i) A function that returns TRUE if the string passed on to it is PALINDROME otherwise it shall return FALSE.
(ii) Print the nth element of the Fibonacci series.