UGC Net Computer Science December-12 Paper 3

UGC Net Computer Science December-12 Paper 3 (Solved)

1. Eco system is a Frame work for

(A) Building a Computer System

(B) Building Internet Market

(C) Building Offline Market

(D) Building Market

Answer B

Explanation : 

A digital ecosystem is a distributed, adaptive, open socio-technical system with properties of self-organisation, scalability and sustainability inspired from natural ecosystems. Digital ecosystem models are informed by knowledge of natural ecosystems, especially for aspects related to competition and collaboration among diverse entities. The term is used in the computer industry, the entertainment industry, and the World Economic Forum.

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UGC Net Computer Science Paper 1 December 12 , Page 2-Solved

UGC Net Computer Science Paper 1 December 12 , Page 2-Solved

11. The sum of the ages of two persons A and B is 50. 5 years ago, the ratio of their ages was 5/3. The present age of A and B are

(A) 30, 20

 (B) 35, 15

(C) 38, 12

 (D) 40, 10
Answer A
Explanation :-

Equations:
a + b = 50
(a-5)/(b-5) = 5/3
-------
For solve this expression we need to change a with b

a = 50-b

(50-b-5)/(b-5) = 5/3
----
3(45-b) = 5(b-5)
135 - 3b = 5b - 25
8b = 160
b = 20
Then a = 30

12. Let a means minus (–), b means multiplied by (x), C means divided by (/) and D means plus (+). The value of 90 D 9 a 29 C 10 b 2 is

(A) 8 

(B) 10

(C) 12 

(D) 14
Answer Incorrect
Explanation :-
a = -
b = *
c = /
d = +

90 D 9 a 29 C 10 b 2

90 + 9 - 29 / 10 * 2
90+9-2.9*2
90+9-5.8
93.2

Write a program to check whether a number is perfect or not ?

Question : Write a program to check whether a number is perfect or not ?

(A number said to be  perfect if sum of all factor  less than given number then equal to given number)
Input : 6
Output : Perfect Number