Test Papers / Previous Question Papers of IGNOU CS02 (S) Introduction to Software June 2006

PGDCA / MCA (I Yr) / BCA
Term-End Examination

CS02 : Introduction to Software

Time: 2 hours
Maximum Marks: 60

June 2006

PART A

1. (a) Write an algorithm to find the roots of a given quadratic equation. Also, draw the flowchart for this. (6)

(b) Explain, with an example and using a diagram, the steps to handle page fault in a paged memory management. (6)

(c) Write a shell program that takes a file as the input and counts the number of characters, words and lines in the file. (8)

(d) With the help of a diagram, explain all the phases involved in a waterfall life cvcle model. (10)

2. (a) List all the important tasks performed during each phase of compiler design. (5)

(b) What is the basic philosophy of the X-Windows system ? How are its components different from those of other GUIs? (5)

3. (a) Explain the desirable characteristics of software product and process. (4)

(b) Using a diagram, explain a demand paging scheme. Also give a suitable example. (6)

4. (a) Write a shell script 'Page' that paginates a given' file (i.e. to print a fixed number of lines from a file), and then waits for user response before printing the next page of the file on the screen. (5)

(b) Write a regular expression for the following statements of 'C' Ianguage : (5)
(i) Assignment
(ii) Switch

5. (a) Write Unix commands for the following : (5)
(i) To list all the processes running on the system.
(ii) To display the last 5 lines of a file.
(iii) To find the occurrences of a given pattern in a file.
(iv) To compare the content of two files.
(v) To senda message to other terminals.

(b) What is 4GL? How is it different from 2GL and 3GL ? List any three 4GL languages with their applications. (5)