Physical Database Design A field represents each component of a composite attribute. False True False True ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design The three newest database architectures in use today are relational, multidimensional and hierarchical. 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 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. 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. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Selecting a data type involves which of the following? All of these Improve data integrity Represent most values Maximize storage space All of these Improve data integrity Represent most values Maximize storage space 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. All of these 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. Limit the set of permissible values that a field may assume. All of these 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. 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
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