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Posted By: RAFI Member Level: Gold Posted Date: 17 Jun 2008
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2007 Indira Gandhi National Open University (IGNOU) B.C.A CS-63 : INTRODUCTION TO SYSTEM SFTWARE, JUNE - 2007 Question paper
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CS-63 : INTRODUCTION TO SYSTEM SFTWARE,
JUNE - 2007
Note: Question 1 is compulsory Answer any three from the rest.
1. (a) Explain the steps in 2-pass assembler in detail. Also give limitations of 1-pass assembler.
(b) Write a shell program to find the sum of the series:
1 + 3 + 5 + 7 + …. N
(c) Write an algorithm to solve mutual exclusion problem using semaphore and explain the logic.
(d) Consider the following set of processes arrived at the same time:
Process CPU time
P1 4
P2 2
P3 6
P4 7
Draw the Gantt charts and calculate the average waiting time and average Turnaround time for
(i) RR (Quantum = 2)
(ii) FCFS.
2. (a) How is multiprogramming with dynamic partitioning better than that of fixed partitioning? Explain with an example.
(b) Explain the graphical user interface features of X-windows development Environment.
3. (a) What is the role of a scheduler? List and explain the types of schedulers.
(b) Generate a parse tree for:
P = a / b + c * d + e- f
For the grammar:
list – list + digit
list – list * digit
list – list / digit
list – list – digit
list – digit
digit – 0:1:2:3: …. : 9:
4. (a) Write UNIX commands for the following:
(i) To display the long listing of files.
(ii) To appeared the contents of file 1 to the contents of file2.
(iii) To display the differences of any two files.
(iv) To copy a file with any other file name in the same directory.
(b) Explain the concept of demand paging and segmentation with diagrams.
5. (b) Write a shell program to print the alternate digits in a 5-digit number.
Example: 7 6 5 8 4
It should display 7 5 4.
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