多项选择题
A.A bitmap is used to record free extents.
B.Free extents information is managed within the tablespace.
C.Free extents information is managed in the SYSAUX tablespace.
D.The data dictionary tables are updated when extents are allocated or deallocated
单项选择题 User A executes the following command to drop a large table in your database：SQL> DROP TABLE trans； While the drop table operation is in progress， user B executes the following command on the same table：SQL> DELETE FROM trans WHERE tr_type=’SL’； Which statement is true regarding the DELETE command（）
单项选择题 View the Exhibit to examine the details for an incident. Which statement is true regarding the status of theincident（）
单项选择题 View the Exhibit and examine the parameters. User A executes the following command to update the TRANStable： SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT orROLLBACK command， user B executes the following command on the TRANS table： SQL> ALTER TABLE trans MODIFY （tr_type VARCHAR2（3））； What would happen in this scenario（）
