CS Foundation :: Information Systems and Quantitative Techniques : June 2005

Roll No…………………
Time allowed : 3 hours		Maximum marks : 100
Total number of questions : 8		Total number of printed pages : 2
PART—A (Answer Question No.1 which is compulsory and any two of the rest from this part.)

Write notes on the following :

(i)
(ii)
(iii)
(iv)

Black box concept
Factors affecting information needs
Benefits of computers
Methods of detecting computer crimes.

(5 marks each)

(a)

Define ‘management information system’ (MIS) and mention its important characteristics.

(8 marks)

(b)

What is DOS ? Discuss any three DOS commands. What is the difference between a file and a directory ?

(7 marks)

(a)

Discuss the major functions of ‘operating system’.

(8 marks)

(b)

What are the functions of ‘data base management system’ (DBMS) ?

(7 marks)

(a)

What are the general aims of writing programs ?

(5 marks)

(b)

Describe top down programming approach.

(5 marks)

(c)

Write a note on ‘visual programming’.

(5 marks)

PART—B
(Answer Question No.5 which is compulsory
and any two of the rest from this part.)

(a)

Write notes on any three of the following :

(i)
(ii)
(iii)
(iv)
(v)

Significance of quantitative techniques
Law of statistical regularity
Census and sample investigation
Objectives of measurement of seasonal variations
Harmonic mean.

(4 marks each)

(b)

The following is the distribution of weekly wages of workers:

Wages (Rs.)
No. of Workers

50 - 100
25

100 - 150
42

150 - 200
63

200 - 250
50

250 - 300
20

Determine —
(i) Median (Md) and quartiles (Q1 and Q3); and
(ii) Percentage of workers getting weekly wages between Rs.125 and Rs.260.

(8 marks)

P.T.O

( 2 )

115

(a)

Distinguish between the following :

(i)
(ii)
(iii)

‘Continuous series’ and ‘discrete series’.
‘Exclusive class intervals’ and ‘inclusive class ntervals’.
‘More than’ and ‘less than’ frequency tables.

(2 marks each)

(b)

Weights of 10 students in kilograms are given below. Find the mean, standard deviation and its coefficient
41, 44, 45, 49, 50, 53, 55, 55, 58, 60

(9 marks)

(a)

Describe the merits and demerits of sampling.

(5 marks)

(b)

From some given data, the consumer price index based on 5 groups was calculated at 205. The percentage increase in prices over base period is given below :

Rent and taxes
Fuel and light
Clothing
Miscellaneous 60
120
210
130

Calculate the percentage increase in the food group given that the weights of the different groups were as follows

Food
Rent and taxes
Fuel and light
Clothing
Miscellaneous 60
16
12
8
4

(10 marks)

(a)

Explain any one application of linear programming model.

(5 marks)

(b)

Solve graphically the following linear programming problem:

Minimize Z =	4x₁ + 3x₂
Subject to	2x₁ + 3x ₂ ≥ 6 2x₁ + 3x ₂ ≥ 12 x₁ + x₂ ≥ 5 x_1, x₂ ≥ 0

(10 marks)

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