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 CHAR VARCHAR2 LONG NUMBER CHAR VARCHAR2 LONG ANSWER DOWNLOAD EXAMIANS APP
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 The blocking factor is: a group of fields stored in adjacent memory. attributes grouped together by the same primary key. the number of physical records per page. attributes grouped together by the same secondary key. a group of fields stored in adjacent memory. attributes grouped together by the same primary key. the number of physical records per page. attributes grouped together by the same secondary key. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A field represents each component of a composite attribute. False True False True ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Hashing algorithm converts a primary key value into a record address. False True False True ANSWER DOWNLOAD EXAMIANS APP
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
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