单项选择题
Which type of backup contains only the blocks that have changed since the last level 0 incremental backup？（）
A. a cumulative level 1 backup
B. a differential level 1 backup
C. a full backup
D. a whole backup
相关考题
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单项选择题
You want to set the following initialization parameters for your database instance: LOG_ARCHIVE_DEST_1 = LOCATION=/disk1/arch LOG_ARCHIVE_DEST_2 = LOCATION=/disk2/arch LOG_ARCHIVE_DEST_3 = LOACTION=/disk3/arch LOG_ARCHIVE_DEST_4 = LOCATION=/disk4/arch MANDATORY 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. -
单项选择题
Your system has been upgraded from Oracle Database 10g to Oracle Database 11g. You imported SQL Tuning Sets （STS） from the previous version. After changing the OPTIMIZER_FEATURE_ENABLE parameter to 10.2.0.4 and running the SQL Performance Analyzer， you observed performance regression for a few SQL statements. What would you do with these SQL statements？（）
A. Set OPTIMIZER_USE_PLAN_BASELINES to FALSE to prevent the use of regressed plans.
B. Capture the plans from the previous version using STS and then load them into the stored outline.
C. Capture the plans from the previous version using STS and then load them into SQL Management Base （SMB）
D. Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to FALSE to prevent the plans from being loaded to the SQL plan baseline. -
单项选择题
A database instance is using an Automatic Storage Management (ASM) instance, which has a disk group, DGROUP1, created as follows: SQL> CREATE DISKGROUP dgroup1 NORMAL REDUNDANCY FAILGROUP controller1 DISK /devices/diska1, /devices/diska2 FAILGROUP controller2 DISK /devices/diskb1, /devices/diskb2 ; What happens when the whole CONTROLLER1 Failure group is damaged?（）
A. The transactions that use the disk group will halt.
B. The mirroring of allocation units occurs within the CONTROLLER2 failure group.
C. The data in the CONTROLLER1 failure group is shifted to the CONTROLLER2 failure group and implicit rebalancing is triggered.
D. The ASM does not mirror any data and newly allocated primary allocation units (AU) are stored in the CONTROLLER2 failure group.
