Physical Database Design Sequential retrieval on a primary key for sequential file storage has which of the following features? Very fast Impractical Slow Moderately fast Very fast Impractical Slow Moderately fast ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A rule of thumb for choosing indexes for a relational database includes which of the following? 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. Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries. Indexes are more useful on smaller tables. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Selecting a data type involves which of the following? Represent most values Improve data integrity All of these Maximize storage space Represent most values Improve data integrity All of these Maximize storage space ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Some advantages of partitioning include: efficiency, security, and load balancing. True False True False ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design The fastest read/write time and most efficient data storage of any disk array type is: RAID-0 RAID-2 RAID-3 RAID-1 RAID-0 RAID-2 RAID-3 RAID-1 ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary? CHAR LONG NUMBER VARCHAR2 CHAR LONG NUMBER VARCHAR2 ANSWER DOWNLOAD EXAMIANS APP
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