11. A secondary key is which of the following? A. Nonunique key B. Primary key C. Useful for denormalization decisions D. Determines the tablespace required Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
12. The fastest read/write time and most efficient data storage of any disk array type is: A. RAID-0 B. RAID-1 C. RAID-2 D. RAID-3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
13. A rule of thumb for choosing indexes for a relational database includes which of the following? A. Indexes are more useful on smaller tables. B. Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries. C. Do not specify a unique index for the primary key of each table. D. Be careful indexing attributes that have null values. Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
14. Sequential retrieval on a primary key for sequential file storage has which of the following features? A. Very fast B. Moderately fast C. Slow D. Impractical Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
15. A multidimensional database model is used most often in which of the following models? A. Data warehouse B. Relational C. Hierarchical D. Network Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
16. Two basic constructs to link one piece of data with another piece of data: sequential storage and pointers. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
17. Denormalization and clustering can work well to minimize data access time for small records. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
18. Hashing algorithm converts a primary key value into a record address. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
19. The primary goal of physical database design is data processing efficiency. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
20. A bitmap index is an index on columns from two or more tables that come from the same domain of values. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
