Physical Database Design Which of the following are integrity controls that a DBMS may support? All of these Limit the use of null values in some fields. Assume a default value in a field unless a user enters a value for that field. Limit the set of permissible values that a field may assume. All of these Limit the use of null values in some fields. Assume a default value in a field unless a user enters a value for that field. Limit the set of permissible values that a field may assume. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A multidimensional database model is used most often in which of the following models? Hierarchical Network Data warehouse Relational Hierarchical Network Data warehouse Relational 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 Random row access speed Block contention The length of all of the fields in a table row The number of columns Random row access speed Block contention The length of all of the fields in a table row ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Two basic constructs to link one piece of data with another piece of data: sequential storage and pointers. False True False True ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Which of the following improves a query's processing time? Write complex queries. Query one query within another. Combine a table with itself. Use compatible data types. Write complex queries. Query one query within another. Combine a table with itself. Use compatible data types. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design The blocking factor is: 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. a group of fields stored in adjacent memory. attributes grouped together by the same primary key. attributes grouped together by the same secondary key. ANSWER DOWNLOAD EXAMIANS APP
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