單項(xiàng)選擇題

Your database is in NOARCHIVELOG mode. The database has three online redo log groups， and each group contains three online redo log members. The online redo log members are stored across three hard disks， E， F， and G， respectively. Hard disk G crashed while the LGWR background process was writing redo information to the online redo log files. What effect will this crash have on the database？（）

A. The database will operate normally without generating any redo.
B. The database will hang， and you must shut down and restart the instance.
C. The database will crash， and you must recover the database from the point of failure.
D. The database will operate normally and will generate minimal redo for the tables created with the NOLOGGING clause.

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單項(xiàng)選擇題

At database startup， you discover that one of the disks containing an index tablespace has been lost due to a media failure. A backup of the lost index tablespace is not available. You have all the necessary scripts to recreate the indexes. You need to re-create the indexes in a new index tablespace. Which action must you perform before re-creating the indexes？（）

A. Start the database in OPEN mode， and create a new index tablespace.
B. Start the database in OPEN mode， and drop the lost index tablespace from the database.
C.Start the database in MOUNT mode， create a new index tablespace， and drop the lost index tablespace from the database.
D. Start the database in MOUNT mode， drop the lost index tablespace from the database， open the database， and create a new index tablespace.

單項(xiàng)選擇題

Twenty database users are connected to your database. Five of the users are running long queries involving sort operations. The TEMP tablespace is the default temporary tablespace for your database. You are performing offline tablespace backups of individual tablespaces and erroneously execute the following statement：
SQL>ALTER TABLSPACE temp OFFLINE NORMAL；
What is the result of this statement？（）

A. The TEMP tablespace is taken offline. The users using the TEMP tablespace for sorting are disconnected after their queries complete.
B. The TEMP tablespace is taken offline. The users using the TEMP tablespace for sorting are disconnected and must re-execute their queries.
C. The TEMP tablespace is taken offline. The users using the TEMP tablespace for sorting are not disconnected， but these users must re-execute their queries.
D. The TEMP tablespace is not taken offline. The users using the TEMP tablespace for sorting are not disconnected， and their queries execute successfully.

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