If a unique constraint is defined on column COL1 of table TAB1, what are the characteristics of COL1?（） COL1 will accept NULL values and can be referenced in another table's foreign key specification.。 COL1 will not accept NULL values and cannot be referenced in another tables foreign key specification.。 COL1 will not accept NULL values and can be referenced in another tables foreign key specification.。 COL1 will accept NULL values and cannot be referenced in another tables foreign key specification.。
气瓶的涂膜颜色颜色和色卡应按（）的要求鉴别。 GB/T3183。 GB/T3182。 GB/T3181。
Immediately after adding a new disk to or removing an existing disk from an ASM instance, you find that the performance of the database goes down initially until the time the addition or removal process is completed, and then gradually becomes normal. Which two activities would you perform to maintain a consistent performance of the database while adding or removing disks?（） Define the POWER option while adding or removing the disks。 Increase the number of ARB processes by setting up a higher value for ASM_POWER_LIMIT.。 Increase the number of DBWR processes by setting up a higher value for DB_WRITER_PROCESSES。 Increase the number of slave database writer processes by setting up a higher value for DBWR_IO_SLAVES。
How can permissions be set up on /tmp so that a user cannot delete another user’s files？（） chmod +s /tmp。 chmod 775 /tmp。 chmod 1777 /tmp。 chmod 4755 /tm。
An IBM System Storage DS8700 is being installed at a global corporation’s headquarters location. The storage must be available worldwide. A great deal of coordination is required to schedule this implementation across the corporation. Who is best positioned to fill the role of implementation resource coordinator（） IBM Service Support Representative。 IBM Advanced Technical Support Representative。 IBM Field Technical Support Representative。 IT Manager of the customer。
IBM SAN Volume Controller 在哪个层面实现存储虚拟化？（）
