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Chapter 16, Problem 1RQ

Explanation of Solution

Difference between Data and Information:

Data Information
Data is a raw material to an end user. Information is product to user.
It is used as input for system. It is used as the output of data.
It is an unprocessed fact which does not based on information. It is processed data which always based on data.
It does not transmit any meaning because it is single unit. It transmits the logical meaning because it is a group of data.

For example:

  • Each student score is considered as the data.
  • Reading the temperature history across the world for past 10 years is considered as data.

For example:

  • The average score of complete school or class is considered as information.
  • Data of temperature history is analyzed to identify the rise of global temperature is considered as information.

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Suppose that the two Rank methods below are added to the Skip List class on Blackboard. public int Rank (T item) Returns the rank of the given item. public T Rank(int i) Returns the item with the given rank i. Requirements 1. Describe in a separate Design Document what additional data is needed and how that data is used to support an expected time complexity of O(log n) for each of the Rank methods. Show as well that the methods Insert and Remove can efficiently maintain this data as items are inserted and removed. (7 marks) 2. Re-implement the methods Insert and Remove of the Skip List class to maintain the augmented data in expected O(log n) time. Using the Contains method, ensure that added items are distinct. (6 marks) 3. Implement the two Rank methods. (8 marks) 4. Test your new methods thoroughly. Include your test cases and results in a Test Document. (4 marks)
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