CS Foundation :: Information Systems and Quantitative Techniques : December 2004

Roll No…………………
Time allowed : 3 hours Maximum marks : 100
Total number of questions : 8 Total number of printed pages : 3

PART—A
(Answer Question No.1 which is compulsory and any two of the rest from this part.)
1. (a)

Convert the following from one number system to another number system as indicated against each, and also show your working notes :
(i)(312)8=(   )10
(ii)(2748)10=(   )16
(iii)(0.875)10=(   )2
(iv)(001101100110)=(   )16
(v)(420)10=(   )2
(1 mark each)
(b) What are the functions of marketing information systems?
(5 marks )
(c) Describe in one line each of the five criteria for selection of file organisation method.
(5 marks )
(d) Write the names of any five main categories to which system software can be divided.
(5 marks )
2. Write short notes on any three of the following:
(i)
(ii)
(iii)
(iv)
(v)		 Computer crimes
Distributed database
Indexed sequential file structure
Desktop publishing
Value and cost of information.
(5 marks each)
3. (a) What is ‘flow charting’? State the categories of flow charts.
(7 marks)
(b) What is ‘application software’? State the features of application software.
(8 marks)
4. (a) Explain the characteristics of ‘system’.
(7 marks)
(b)

A decision-maker has three alternatives with varying profits based on different states of natures, they may happen. The payoffs along with probabilities of states of nature are given in the following table:
Strategies

X
Y
Z		 Conditions (States of Nature)
1 (0. 15)
1, 200
800
1, 300		 2 (0. 25)
800
1, 200
500		 3 (0. 30)
500
700
600		 4 (0. 30)
— 100
— 50
— 1000
 (i) Calculate the expected values.
(ii) Calculate the value of perfect information.

(7 marks)
P.T.O
2/2004/ISQT


( 2 )

115


PART—B
(Answer Question No.5 which is compulsory
and any two of the rest from this part.)
 
5. Write short notes on the following:
(i)
(ii)
(iii)
(iv)		 Significance of quantitative techniques.
Inferential statistics and analytical statistics
Limitations of statistics
Pie-chart with an illustration.
(5 marks each)
6. (a) Explain various components of a time series. What is analysis of time series?
(8 marks)
(b) Solve the following linear programming problem graphically :
Minimize: Z = 3x1 + 5x2
Subject to − 3x1 + 4x2 ≤ 12
2x1 + 3x2 ≥ 12
x1 ≤ 4
x2 ≥2
x1, x2 ≥ 0
(7 marks)
7. (a) Distinguish between the following :
 (i) ‘Correlation’ and ‘regression’
(ii) ‘Classification’’ and ‘tabulation’ of data..
(4 marks each)
(b)

There are 60 male and 40 female workers in a factory. The standard deviations of their wages (per hour) were computed as Rs.8 and Rs.11 respectively. The mean wages of the two groups were found to be equal. Compute the combined standard deviation of the wages of all the workers.
(7 marks)
8. (a)

From the following figures of production of a sugar factory, fit a straight line trend to these figures :
YearProduction
(In Thousand Tons)
199640.0
199745.0
199846.0
199941.5
200047.0
200149.5
200246.0
(7 marks)
(b) From the following data, construct an index for 2002 taking 2001 as base :
CommoditiesPrice in 2001
(Rs.)		Price in 2002
(Rs.)
Rice
Wheat
Barli
Black gram
Jowar		 100
80
160
220
40		 140
120
180
240
40
(7 marks)

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2/2004/ISQT

 

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