Physical Database Design What is the best data type definition for Oracle when a field is alphanumeric and has a fixed length? CHAR NUMBER VARCHAR2 LONG CHAR NUMBER VARCHAR2 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 Impractical Slow Moderately fast Very fast Impractical Slow ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Selecting a data type involves which of the following? All of these Maximize storage space Represent most values Improve data integrity All of these Maximize storage space Represent most values Improve data integrity ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A rule of thumb for choosing indexes for a relational database includes which of the following? Be careful indexing attributes that have null values. 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. Indexes are more useful on smaller tables. Be careful indexing attributes that have null values. 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. Indexes are more useful on smaller tables. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A multidimensional database model is used most often in which of the following models? Data warehouse Relational Hierarchical Network Data warehouse Relational Hierarchical Network ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design An extent is a contiguous section of disk storage space. True False True False ANSWER DOWNLOAD EXAMIANS APP
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