IGNOU Test Papers - CS02 (S) Introduction to Software - December 2006

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.

December 2006

PART A

1. (a) Design an algorithm and draw a flowchart to reverse the given number 'n' and also print the sum of digits. (7)

(b) Write a shell program that accepts a "name" from the user, check whether it is a file or folder and display an appropriate message accordingly. (7)

(c) Explain the important qualities of software product and process that one should consider for the software development. (8)

(d) Draw a parse treefor the following expressions : (4)
(i) a * b - c + d
(ii) a + b * c * d - e
using the followng productions :
List -> list + digits
List -> list - digits
List -> list * digits
List -> digits
digit is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

(e) Write a shell program to sort the given filenames in alphabetical order. (4)

2. (a) What are the two main issues that should be considered during allocating the space to the files? Explain any two disk allocation methods in detail. (6)

(b) Explain the following commands of UNIX with an example for each : (4)
(i) cut
(ii) grep
(iii) tee
(iv) tail
(v) ps
(vi) kill
(vii) tr
(viii) ln

3. (a) What is a deadlock situation ? What are the essential conditionst hat characterised eadlocks? Explain with the help of a resource allocation graph. (5)

(b) List the UNIX commands for the following : (5)
(i) To sort the numbers in descending order in a data file.
(ii) To count the number of users who are currently logged-in.
(iii) To display last four lines of a given text file.

(iv) To kill a process with process identification number 3022.
(v) To change all the characters of a file to its lower case.

4. (a) Explain the features of Network Operating System and Distributed Operating System.

(b) Explain the following loader schemes :
(i) Absolute loader
(ii) Dynamic loader

5. (a) Write short notes on the following w.r.t. the WINDOWS GUI: (5) (i) Desktop Metaphor
(ii) Pull-down Menu
(iii) Bit-mapped displays
(iv) Icons
(v) Pointing devices

(b) Explain all the phases of System Investigation. (5)

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