Mathematics and Statistics

Answer the questions by search the textbook, and cite; if you can no find the answer, you can google to find the answer, please paraphrase and cite.

1. Briefly explain CHS addressing and LBA for disks. Which approach is more common and why? Is it possible to convert a CHS address to an LBA? If yes, how?

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2. Explain why the allocation of records to blocks in a file affects database-system performance significantly.

3. Give benefits and disadvantages of variable length record management versus fixed-length record management

4. When is it preferable to use a dense index rather than a sparse index? Explain your answer.

5. Since indexes improve search/lookup performance, why not create an index on every combination of columns in a table?

6. Explain the difference between a serial schedule and a serializable schedule.

7. What are the benefits and disadvantages of strict two-phase locking?

8. Outline the no-steal and force buffer management policies. For more information on Mathematics and Statistics check on this:

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