多项选择题

While setting up the database for your production environment, you want to create a user with following requirements.  
1.The objects created by the user must be stored in a tablespace, TBS1, if the  TABLESPACE option is not defined during the object creation.  
2.The user should be able to use 10MB of space in the tablespace TBS1.  
3.The user must change the password immediately after logging in for the first time.  
Which three options of the CREATE USER command would you use to achieve this objective?()

A.profile
B.account lock
C.account unlock
D.password expire
E.quota 10MB on TBS1
F.password never expire
G.default tablespace TBS1
H.quota unlimited on TBS1
I.temporary tablespace TEMP
J.temporary tablespace SYSTEM


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3.单项选择题You work as a database administrator for Supportcenter.cn. You received the following error while working on your database: ORA-01555: snapshot too old ,In which situation would you receive such an error?()

A.You performed rollback after commit.
B.If a log switch occurs in your database.
C.Thearchiverfails to generate an archived log file.
D.Instance recovery fails to find one of the redo log files.
E.A long-running query is unable to get read-consistent image.
F.If you perform manual undo management operations in auto mode.

4.单项选择题You work as a database administrator for Supportcenter.cn. You added atablespaceto your database. Because of the changes to the physical structure of your database, you performed a backup of the control file to trace. After this, you lost only the control files and the instance aborted due to a hardware failure. How would you proceed to recover the database?()

A.Start the instance and open the database, instance recovery automatically recoverscontrol files
B.Create a file based on the contents of the trace file and save it to the control file locations and start the database
C.Re-create the database (The recovery of the control file is not possible because you have lost all the control files.)
D.Start the instance, in the NOMOUNTstate,re-create the control file using the CREATE CONTROLFILE command stored in the trace file.
E.Start the instance and MOUNT the database, then re-create the control file using the CREATE CONTROLFILE command stored in the trace file.

6.多项选择题You work as a database administrator for Supportcenter.cn. Your database is in the MOUNT state and you execute the following command to open it ALTER DATABASE OPEN; What two actions are performed as a result of this command?()

A.All control files are opened
B.All redo files are opened
C.The password file is opened
D.The parameter file is opened
E.All online data files are opened

7.单项选择题You work as a database administrator for Supportcenter.cn. You suspect that in one of your applications the customer table is being accessed by some unauthorized users. Which option would you use to monitor the queries being executed on the customer table?()

A.Monitor thealert.logfile
B.Enable server-side SQL tracing for user sessions
C.Enable fine-grained auditing for the customer table
D.Enable Fine-Grained Access Control (FGAC) for the customer table
E.Write a database trigger on the customer table on the SELECT event

8.单项选择题You work as a database administrator for Supportcenter.cn. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it?()

A.Uses undo data for roll forward
B.Uses Flashback Log for recovery
C.Uses online redo logs to roll back
D.Uses undo data to roll back the transaction
E.Uses Recovery Manager (RMAN) to roll back
F.Uses the System Monitor (SMON) background process to perform instance recovery

10.单项选择题You work as a database administrator for Supportcenter.cn. You are using Recovery Manager (RMAN) for backup and recovery of your database. You executed the delete command in RMAN to delete a backup of a tablespace. Which statement is true in this scenario?()

A.The backup status will be marked expired in RMAN recovery catalog.
B.The backup status will be marked deleted in RMAN recovery catalog after you execute the crosscheck command.
C.The backup will be deleted physically from the OS (Operating system)and the backup information is removed from the recovery catalogl
D.The backup status will be marked deleted and you must delete the backup file manually from the OS (Operating system).
E.The backup status will be marked deleted and you must delete the backup file manually from the OS (Operating system), if you are not using Oracle Managed Files (OMF).

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