Physical Database Design Selecting a data type involves which of the following? Improve data integrity Maximize storage space Represent most values All of these Improve data integrity Maximize storage space Represent most values All of these ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design An extent is a contiguous section of disk storage space. False True False True 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 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. Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A secondary key is which of the following? Determines the tablespace required Useful for denormalization decisions Nonunique key Primary key Determines the tablespace required Useful for denormalization decisions Nonunique key Primary key ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Which of the following is not a factor to consider when switching from small to large block size? The number of columns Block contention Random row access speed The length of all of the fields in a table row The number of columns Block contention Random row access speed The length of all of the fields in a table row ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Data-volume and frequency-of-use statistics are not critical inputs to the physical database design process. False True False True ANSWER DOWNLOAD EXAMIANS APP
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