Physical Database Design Selecting a data type involves which of the following? Improve data integrity Maximize storage space All of these Represent most values Improve data integrity Maximize storage space All of these Represent most values 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 on smaller tables. Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries. 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 on smaller tables. 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 bitmap index is an index on columns from two or more tables that come from the same domain of values. False True False True ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A field represents each component of a composite attribute. True False True False ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Which of the following are integrity controls that a DBMS may support? Limit the set of permissible values that a field may assume. Assume a default value in a field unless a user enters a value for that field. Limit the use of null values in some fields. All of these Limit the set of permissible values that a field may assume. Assume a default value in a field unless a user enters a value for that field. Limit the use of null values in some fields. All of these ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design The three newest database architectures in use today are relational, multidimensional and hierarchical. True False True False ANSWER DOWNLOAD EXAMIANS APP
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