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Immediately after adding a new disk to or removing an existing disk from an Automatic StorageManagement （ASM） instance， you find that the performance of the database decreases initially， until the addition or removal process is completed. Performance then gradually returns to normal levels. 
Which two activities could you perform to maintain a consistent performance of the database while adding or removing disks？（）

USER_DATA is a nonencrypted tablespace that contains a set of tables with data. You want to convert all existing data in the USER_DATA tablespace and the new data into the encrypted format. Which methodswould you use to achieve this?（） Use Data Pump to transfer the existing data to a new encrypted tablespace。 Use ALTER TABLE MOVE to transfer the existing data to a new encrypted tablespace。 Use CREATE TABLE AS SELECT to transfer the existing data to a new encrypted tablespace。 Enable row movement for each table to be encrypted and then use ALTER TABLESPACE to encrypt the tablespace。 Encrypt the USER_DATA tablespace using the ALTER TABLESPACE statement so that all the data in the tablespace is automatically encrypted。 加速养护 Which statement is true regarding the VALIDATE DATABASE command？（）  It checks the database for intrablock corruptions only.。  It checks for block corruption in the valid backups of the database.。  It checks the database for both intrablock and interblock corruptions.。  It checks for only those corrupted blocks that are associated with data files.。 《水利水电工程施工组织设计规范》规定，初期导流泄水建筑物在导流任务完成后，封堵时段（）。 必须选在汛后。 宜选在汛后。 必须选在汛前。 宜选在汛前。 现代篮球运动仍然是向（）、（）、（）、（）相结合的方向发展。

Immediately after adding a new disk to or removing an existing disk from an Automatic StorageManagement （ASM） instance， you find that the performance of the database decreases initially， until the addition or removal process is completed. Performance then gradually returns to normal levels. 
Which two activities could you perform to maintain a consistent performance of the database while adding or removing disks？（）