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Data Mgmt Lab_Part_38 - 112 Chapter 11 Level = 1 N = 4 h1...

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112 Chapter 11 10 00 01 10 11 000 001 010 011 Level = 1 h h 0 1 , N = 4 64 9 25 5 Next = 1 31 15 7 3 63 00 100 44 Figure 11.8
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Hash-Based Indexing 113 1. Show an Extendible Hashing index with the same data entries. 2. Answer the questions in Exercise 11.9 with respect to this index. Answer 11.10 Answer omitted. Exercise 11.11 In answering the following questions, assume that the full deletion algorithm is used. Assume that merging is done when a bucket becomes empty. 1. Give an example of Extendible Hashing where deleting an entry reduces global depth. 2. Give an example of Linear Hashing in which deleting an entry decrements Next but leaves Level unchanged. Show the file before and after the deletion. 3. Give an example of Linear Hashing in which deleting an entry decrements Level . Show the file before and after the deletion. 4. Give an example of Extendible Hashing and a list of entries e 1 , e 2 , e 3 such that inserting the entries in order leads to three splits and deleting them in the reverse order yields the original index. If such an example does not exist, explain.
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