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Posted By: Lenin Member Level: Diamond Posted Date: 30 May 2008
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2006 Indira Gandhi National Open University (IGNOU) Diploma Computer Applications CS02 (S) Introduction to Software - June 2006 Question paper
PGDCA / MCA (I Yr) / BCA
Term-End Examination
CS02 : Introduction to Software
Time: 2 hours
Maximum Marks: 60
Note : Question number 1 is cornpulsory. Attempt any three questions from the rest.
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)
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