Q. What is the purpose of disk mirroring in RAID?

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Q. How does RAID 5 provide fault tolerance?

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Q. In RAID technology, what does disk striping involve?

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Q. What is the advantage of RAID technology?

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Q. In a query-centric system like a data warehouse, what dominates the need to process queries faster?

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Q. What is one of the most effective methods for improving performance in a data warehouse?

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Q. Why can you create a number of indexes for each table in a data warehouse?

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Q. What should be considered when determining the maximum number of indexes per table in a data warehouse?

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Q. Why does the loading of data into a data warehouse slow down when there are a large number of indexes?

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Q. What is the default indexing method in most database management systems?

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Q. Why is the B-Tree index technique considered superior to other indexing techniques?

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Q. What is the selectivity of a column in a table?

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Q. In a B-Tree index, what type of column is most suitable?

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Q. What can be done to improve the selectivity of a non-highly selective column for B-Tree indexing?

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Q. What is a bitmap index?

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Q. How is a bitmap index constructed for a column with distinct values?

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Q. In a bitmapped index, how is the result set determined for a query with multiple predicates?

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Q. What is a disadvantage of bitmapped indexes?

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Q. In a data warehouse environment, when are bitmapped indexes more suitable than B-Tree indexes?

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Q. What is a recommended indexing strategy for dimension tables in a data warehouse?

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