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 number of columns Block contention The length of all of the fields in a table row Random row access speed The number of columns Block contention The length of all of the fields in a table row 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? VARCHAR2 CHAR LONG NUMBER VARCHAR2 CHAR LONG NUMBER ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design A secondary key is which of the following? Nonunique key Primary key Useful for denormalization decisions Determines the tablespace required Nonunique key Primary key Useful for denormalization decisions Determines the tablespace required 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 In general, larger block sizes are used for online transaction processing applications and smaller block sizes are used for databases with a decision support or data warehousing system. False True False True ANSWER DOWNLOAD EXAMIANS APP
Physical Database Design Which of the following are integrity controls that a DBMS may support? Assume a default value in a field unless a user enters a value for that field. All of these Limit the use of null values in some fields. 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. All of these Limit the use of null values in some fields. Limit the set of permissible values that a field may assume. ANSWER DOWNLOAD EXAMIANS APP
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