单项选择题

A. The shrink operation touches every block in the BOOK……

Examine the following command:
SQL> ALTER TABLE booking SHRINK SPACE COMPACT;
Which activity is performed when the preceding command is executed?（）

A. The shrink operation touches every block in the BOOKING table
B. The high-water mark (HWM) for the BOOKING table is shifted from its original position
C. The progress of the shrink operation is saved in the bitmap blocks of the BOOKING table
D. The data manipulation language (DML) triggers on the BOOKING table are executed because the shrink operation is internally handled by the INSERT/DELETE operation

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热门试题

单项选择题Multiple RMAN sessions are connected to the database instance. Examine the following output when backup commands are running in server sessions: What could have helped you to correlate server sessions with channels?（）

A. Implement RMAN multiplexing
B. Set the DEBUG ON in the RMAN script
C. Specify the command ID in the RMAN script
D. Use a tag with the RMAN BACKUP command

单项选择题You observed the following output for a user session: What do you infer from the preceding output?（）

A. Resumable set for session with sid 18
B. The user session has entered into a deadlock
C. The database instance is enabled to use asynchronous commit
D. The threshold warning limit is exceeded for the tablespace that is used by the user session

单项选择题Your database interface is running. A user SCOTT starts a SQL *Plus session, and issues the following query: SQL> SELECT * FROM sales; Which process would retrieve the result from the database and return it to the client program?（）

A. User process
B. Server process
C. System Monitor (SMON)
D. Process Monitor (PMON)
E. Checkpoint process (CKPT)

单项选择题View the exhibit and examine the output. Which statement can be an inference from the output?（）

A. The FRA disk group has an asynchronous I/O bottleneck
B. The least number of I/Os are performed on the last data file in the list
C. The number of times that the backup or restore process directed the OS to wait until an I/O was complete is the highest for the last data file in the list
D. The number of times that the backup or restore process made an OS call to poll for I/O completion in Nonblocking mode is the least for the FRA disk group

单项选择题You are using recovery Manager (RMAN) with a recovery catalog to backup up your production database. The backups and the archived redo log files are copied to a tape drive on a daily basis. The database was open and transactions were recorded in the redo logs. Because of fire in the building you lost your servers having the production database and the recovery catalog database. The archive log files generated after the last backup are intact on one of the remote locations. While performing a disaster recovery of the production database what is the next step that you must perform after restoring the data files and applying archived redo logs?（）

A. Open the database in NORMAL mode
B. Open the database in read-only mode
C. Open the database in RESTRICTED mode
D. Open the database with the RESETLOGS option