Physical Database Design The blocking factor is: a group of fields stored in adjacent memory. attributes grouped together by the same primary key. attributes grouped together by the same secondary key. the number of physical records per page. a group of fields stored in adjacent memory. attributes grouped together by the same primary key. attributes grouped together by the same secondary key. the number of physical records per page. 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. Indexes are more useful on smaller tables. Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries. Be careful indexing attributes that have null values. Do not specify a unique index for the primary key of each table. Indexes are more useful on smaller tables. Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries. Be careful indexing attributes that have null values. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A pointer is a detailed coding scheme recognized by system software for representing organizational data. True False True False ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design If a denormalization situation exists with a many-to-many or associative binary relationship, which of the following is true? All fields are stored in four relations. All fields are stored in three relations. All fields are stored in one relation. All fields are stored in two relations. All fields are stored in four relations. All fields are stored in three relations. All fields are stored in one relation. All fields are stored in two relations. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Sequential retrieval on a primary key for sequential file storage has which of the following features? Moderately fast Slow Impractical Very fast Moderately fast Slow Impractical Very fast ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A secondary key is which of the following? Nonunique key Useful for denormalization decisions Primary key Determines the tablespace required Nonunique key Useful for denormalization decisions Primary key Determines the tablespace required ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS