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[多选] Which three statements correctly describe the functions and use of constraints? ()

A . Constraints provide data independence.
B . Constraints make complex queries easy.
C . Constraints enforce rules at the view level.
D . Constraints enforce rules at the table level.
E . Constraints prevent the deletion of a table if there are dependencies.
F . Constraints prevent the deletion of an index if there are dependencies.

An IT director needs to deploy 3 partitions, each using dedicated internal boot disk. Which system will support the customer requirement using the least amount of rack space?() Power 770 servers。 Power 750 servers。 Power 755 servers。 Power 720 server。 An application vendor wants to choose a fault tolerant platform for their new application.  The application benefits from multiple processors and has been tested on Red Hat Advanced Server 3.  To determine the memory requirements for the application, which of the following is the best procedure?() The application should be tested and baselines should be measured with simulated user loads.。 The application should be tested with the minimum amount of memory then increase the memory in increments until an acceptable response is achieved.。 The application should be tested with differing amounts of memory and the fastest response time is reached it should be used as the acceptable configuration.。 The application should be tested with the maximum amount of memory then decrease the memory in increments until an acceptable price/performance ratio is reached.。 失业人员失业前用人单位和本人累计缴费十年以上的,领取失业保险金的期限最长为二十个月。 You notice that the performance of the database has degraded because of frequent checkpoints.  Which twoactions resolve the issue() Disable automatic checkpoint tuning.。 Check the size of the redo log file size and increase the size if it is small.。 Set the FAST_START_MTTR_TARGET parameter as per the advice given by the MTTR Advisor.。 Decrease the number of redo log members if there are more than one redo log members available in eachredo log group.。 服务管理参考的ITILV2中属于功能模块的是() 安全管理模块。 变更管理模块。 服务台模块。 问题管理模块。 Which three statements correctly describe the functions and use of constraints? ()
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