Physical Database Design Which of the following are integrity controls that a DBMS may support? 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 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. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary? NUMBER VARCHAR2 CHAR LONG NUMBER VARCHAR2 CHAR LONG 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 Very fast Slow Impractical Moderately fast Very fast Slow Impractical ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A secondary key is which of the following? Useful for denormalization decisions Primary key Determines the tablespace required Nonunique key Useful for denormalization decisions Primary key Determines the tablespace required Nonunique key ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Distributing the columns of a table into several separate physical records is known as horizontal partitioning. False True False True 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
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