Physical Database Design A secondary key is which of the following? Primary key Useful for denormalization decisions Nonunique key Determines the tablespace required Primary key Useful for denormalization decisions Nonunique key Determines the tablespace required ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design The fastest read/write time and most efficient data storage of any disk array type is: RAID-3 RAID-0 RAID-2 RAID-1 RAID-3 RAID-0 RAID-2 RAID-1 ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A rule of thumb for choosing indexes for a relational database includes which of the following? Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries. Indexes are more useful on smaller tables. Do not specify a unique index for the primary key of each table. Be careful indexing attributes that have null values. Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries. Indexes are more useful on smaller tables. Do not specify a unique index for the primary key of each table. Be careful indexing attributes that have null values. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Sequential retrieval on a primary key for sequential file storage has which of the following features? Very fast Slow Impractical Moderately fast Very fast Slow Impractical Moderately fast ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A multidimensional database model is used most often in which of the following models? Relational Data warehouse Hierarchical Network Relational Data warehouse Hierarchical Network ANSWER DOWNLOAD EXAMIANS APP
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