单项选择题
Your test database is running in NOARCHIVELOG mode. Which statement is true regarding the type ofbackups that can be performed on the database（）
A.You can perform online whole database backups.
B.You can performofflinewhole database backups.
C.You cannot perform schema-level export/import operations.
D.You can perform the backup of only the SYSTEM tablespace when the database is open.
相关考题
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多项选择题
WhichtwostatementsaretrueabouttheAutomaticWorkloadRepository（AWR）（）
A.All AWR tables belong to the SYSTEM schema.
B.The AWR contains systemwide tracing and logging information.
C.The snapshots collected by the AWR are accessible through data dictionary views.
D.The snapshots collected by the AWR are used by self-tuning components in the database. -
单项选择题
View the Exhibit and examine the attributes of an undo tablespace. In an OLTP system, the user SCOTT has started a query on a large table in the peak transactional hourthat performs bulk inserts. The query runs for more than 15 minutes and then SCOTT receives thefollowing error: ORA-01555: snapshot too old What could be the reason for this error（）
A.The query is unable to get a read-consistent image.
B.There is not enough space in Flash Recovery Area.
C.There is not enough free space in the flashback archive.
D.The query is unable to place data blocks in undo tablespace
