单项选择题
A.The trace file is in binary format.
B.The trace file has a SQL script to re-create the control file.
C.The trace file is a backup set created during the backup of the control file.
D.The trace file contains the instructions to manually re-create the control file.
E.The trace file is an image copy of the control file created during the backup of the control file.
单项选择题 User A executes the following command to update the TRANS table） SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT or ROLLBACK 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？（）
多项选择题 Whichtwostatementsaboutbigfiletablespacesaretrue？（）
单项选择题 Whichstatementistrueaboutthelossofsystem-criticaldatafilesinARCHIVELOGmode？（）