单项选择题

Which statement is true while creating subplans using Resource Manager？（）

A. The subplan must belong to the consumer group， SYS_GROUP.
B. The total CPU usage at any given level must be less than 100%.
C. The subplans can be used to restrict the degree of parallelism for a user.
D. You can use a resource plan instead of a consumer group to implement a priority ranking within the plan.

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多项选择题

You are using Oracle Database 10g. You performed an incomplete recovery of your database and opened the database with the RESETLOGS option. What is the effect of opening the database with the RESETLOGS option？（）

A. This operation resets the SCN for the database.
B. This operation creates a new incarnation of the database.
C. This operation moves all the redo log files to a different location.
D. This operation deletes the old redo log files and creates new redo log files.
E. This operation updates all current datafiles and online redo logs and all subsequent archived redo logs with a new RESETLOGS SCN and time stamp.

多项选择题

For an incomplete recovery， which four backup types can be used by Recovery Manager （RMAN） to restore data files？（）

A. RMAN image copies.
B. RMAN database backups.
C. RMAN tablespace backups.
D. User-managed backups placed in the flash recovery area.
E. User-managed backups that have been cataloged with RMAN.
F. User-managed data file backups for which the pull path name is specified.

多项选择题

You have set the value of the NLS_TIMESTAMP_TZ_FORMAT parameter in the parameter file to YYYY-MM-DD. The default format of which two data types would be affected by this setting？（）

A. DATE
B. TIMESTAMP
C. INTERVAL YEAR TO MONTH
D. INTERVAL DAY TO SECOND
E. TIMESTAMP WITH LOCAL TIME ZONE