CS507-Information Systems Assignment No. 04 Fall 2012 Due Date: 21/01/2013

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CS507 Information System Assignment 4 Solution

Question 1: (5 Marks)

Following is a class diagram.

You are required to analyze the above Class diagram and identify;
1. The type of relationship among classes

2. Attributes

Question 2: (5 Marks)
Suppose you are working as an IT Security professional in a multinational organization. Given is the list of
possible threats that can be harmful for the Information system of this organization. Your task is to identify that
which of the following threats are logical and which of them are physical.
1. Bomb attack
2. Flood
3. Loss of electricity
4. Malicious code

5. Unauthorized changes of records

Question 3: (5 Marks)
According to the annual risk assessment of a multinational organization ABC, following are the results.
1. The probability of power failure in a one-year period is 25 percent and the loss while power is down is Rs.
752500 on the average for each occurrence.
2. The User errors have a 95 percent chance of occurring over a yearly period, with average loss of Rs.
15200 for each occurrence.

You have to calculate the amount of expected loss (annual) for Power failure and User errors risks.

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