Physical Database Design What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary? CHAR LONG NUMBER VARCHAR2 CHAR LONG NUMBER VARCHAR2 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? Random row access speed The length of all of the fields in a table row Block contention The number of columns Random row access speed The length of all of the fields in a table row Block contention The number of columns ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Which of the following improves a query's processing time? Combine a table with itself. Write complex queries. Query one query within another. Use compatible data types. Combine a table with itself. Write complex queries. Query one query within another. Use compatible data types. ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design The primary goal of physical database design is data processing efficiency. 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
Physical Database Design A secondary key is which of the following? Nonunique key Determines the tablespace required Useful for denormalization decisions Primary key Nonunique key Determines the tablespace required Useful for denormalization decisions Primary key ANSWER DOWNLOAD EXAMIANS APP
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