You have configured flash recovery area in your database and you set the following Initialization parameters for your database instance：  
LOG_ARCHIVE_DEST 1 = ，，LOCATION=/disk1/arch MANDATORY’ 
LOG _ARCHIEVE_DEST 2 = ，，LOCATION=/disk2/arch’
LOG_ARCHIVK_DEST_3 = ，，LOCATION=/diSk3/arch 
LOG_ARCH1VK_DEST_4 = ’ LOCATION=/disk4/arch’ 
LOG_ARCHIVE_MIN-SUCCEED_DEST = 2  
While the database instance is functional，you realized that the destination set by the 
LOG_ARCHIVE_DEST_I parameter Is not available for the archived redo log file to be created in. All redo log groups have been used. 
What happens in an event of log switch？（）  

单项选择题You executed the following command in Recovery Manager （RMAN）：   RMAN> REPORT NEED BACKUP days 3；   What is the output of this command？（）

A. a list of files that require a backup within three days
B. a list of files requiring more than 3 days of archive logs to apply
C. a list of files that RMAN recommends be backed up only once in every three days，based on low volatility
D. a list of files for which a backup has already been performed in the last three days and which is required to be backed up again based on the high number of transactions performed on them

多项选择题WhichofthefollowingcannotbeusedasinputtotheSQLTuningAdvisor？（）

A. A single SQL statement provided by a user
B. An existing SQL Tuning Set （STS）
C. A preprocessed Database Replay workload
D. A schema name
E. SQL statement identified in EM as using excessive resources

单项选择题You want to set the following Initialization parameters for your database Instance   LOG_ARCHIVE_DEBT_1 = ，，LOCATION= disk1 arch LOG_ARCHIVE_DBST_2 = ，，LOCATION= disk2 arch LOC_ARCHIVB DBST_3 = ，，LOCATION= disk3 arch LOG_ARCHIVE DBST_ = ，，LOCATION= disk3 arch   Identify the statement that correctly describes this setting.（）

A. The MANDATORY location must be a flash recovery area.
B. The optional destinations may not use the flash recovery area.
C. This setting is not allowed because the first destination is not set as MANDATORY.
D. The online redo log file is not allowed to be overwritten if the archived log cannot be created in the fourth destination.

多项选择题Your database is running In ARCIIIVELOG mode. One of the data files， USBRDATAOI. DBF， in the users tablespace is damaged and you need to recover the file until the point of failure. The backup for the data file is available.  Which three files would be used in the user-managed recovery process performed by the database administrator （DBA）？（）

A. redo logs
B. control file
C. temporary files of temporary tablespace
D. the latest backup of only the damaged data file
E. the latest backup of all the data files In the USERS tablespace

单项选择题You configured the default backup device type as disk for RMAN backups. In your database，because of business requirements，you have to take a simultaneous duplicate backup of the data files when the RMAN BACKUP command is used.  What must you set using the RMAN CONFIGURE command to achieve this？（）

A. MAXSETSIZE TO 2
B. DEVICE TYPE DISK PARALLELISM 2
C. RETENTION POLICY TO REDUNDANCY 2
D. DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2