CS Foundation :: Information systems and quantitative techniques : June 2004

Roll No…………………
Time allowed : 3 hours	Maximum marks : 100
Total number of questions : 8	Total number of printed pages : 4
PART – A
(Answer Question No.l which is compulsory and any two of the rest from this part.)

(a)

"Systems approach is based on a scientific method of problem solving. Problems, opportunities and solutions are viewed through various steps of systems approach." Briefly discuss the steps of systems approach.

(b)

"Even though LAN and WAN provide networking of computers in an organisation, it cannot continue computerised operations without various important secondary storage devices." Give details of various secondary storage devices.

(c)

"Disadvantages of traditional file oriented approach of information processing may motivate an organisation to move to the database approach." Discuss briefly these disadvantages.

(d)

"No programme can be prepared without keeping in mind the general aims of writing a programme." What are these general aims ?

(e)

What are the various modes of committing computer crimes ?

(4 marks each)

(a)

Discuss in detail the recent trends in information system.

(b)

Write a detailed note on major modules of a database system.

(c)

What are 'programming languages' ? Discuss briefly the third generation programming languages.

(5 marks each )

Distinguish between the following :

(i)	'Low level language' and 'high level language'.
(ii)	'Primary storage' and 'secondary storage'.
(iii)	'Flow chart' and 'algorithm'.
(iv)	'Hardware' and 'software'.
(v)	'Report programme generator language' and 'query

(3 marks each)

(a)

Explain the following :

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

ROM
Modem
Bit
Interpreter
Entropy
Key Board
Virus.

(1 marks each )

(b)

Convert :

(i)	(511)₁₀ to binary number,
(ii)	(11001)₂ to decimal number,
(iii)	(222)₈ to decimal number,
(iv)	(148)₁₀ to hexadecimal number.

(2 marks each )

1/2004/ISQT

P.T.O.

114

: 2 :

PART – B

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

Differentiate between the following :

(i)	'Measures of central tendency' and 'measures of dispersion'.
(ii)	'Primary data' and 'secondary data',
(iii)	'Census' and 'sample',
(iv)	'Line diagram' and 'simple bar diagram'.
(v)	'Correlation' and 'regression'.

(4 marks each )

State, with reasons, whether the following statements are correct or incorrect (Attempt any five) :

(i)	Statistics is perfect in nature and it has no limitations at all.
(ii)	Mean is affected by extreme observations.
(iii)	Quartile deviation takes into account the top 50 per cent of the observations.
(iv)	Coefficient of correlation is a statistical tool which measures the degree of relationship between two or more variables.
(v)	Linear programming problem involving more than two variables can be easily solved by graphical method.
(vi)	Arithmetic mean and weighted mean are the same.

(3 marks each)

(a)

Find the most likely price in Mumbai corresponding to the price of Rs.70 at Kolkata from the following data :
Average price at Kolkata (x) 65 Average price at Mumbai (y) 67 Standard deviation of Kolkata price 2.5
Standard deviation of Mumbai price 3.5 r = + 0.8 between the price in the two cities.

(7 marks )

(b)

A group of eight students get the following percentage of marks in Statistics and Accountancy :

Roll NO. of Students 1 2 3 4 5 6 7 8	Marks in Statistics(%) 50 60 65 70 75 40 70 80	Marks in Accountancy (%) 80 71 60 75 90 82 70 50
Compute the rank correlation coefficient.

(8 marks )

(a)

Find the dual of the following linear programming problem :

Max. Z = 5x₁ + 16x₂
Subject to the constraints	2x₁ + 7x₂ < 110 x₁ + 5x₂ < 80 4x₁ + 3x₂ > 90 x₁ , x₂ > 0.

(5 marks )

(b)

Solve graphically the following linear programming problem :

Z = 40x + 80y
Subject to the constraints	2x + 3y <48 x < 15 y < 10 y < 10 x > 0 y > 0.

(10 marks )

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1/2004/ISQT