You have the following requirements in relation to the detection of block corruption for your database instance: 1. Check for logical self-consistency of data blocks when modified in memory. 2. Checksums are calculated before and after the block change. 3. Checks are performed for the lost writes to the physical standby database. Which method would help you perform the above checks automatically? （） Set the DB_SECUREFILE parameter to PERMITTED。 Set the DB_ULTRA_SAFE parameter to DATA_ONLY。 Set the DB_LOCK_CHECKSUM parameter to TYPICAL。 Set the DB_LOST_WRITE_PROTECT parameter to TYPICAL。
问卷设计中，封闭式问题的缺点有（）。 备选答案可能会产生不穷尽的现象。 回答问题的要求比较高。 填写问卷花费的时间比较多。 可能会产生被调查者不知如何。
光滑极限量规用来检验螺纹的什么尺寸？
A system administrator is monitoring a system that has recently shown a decrease in performance. The administrator suspects there is an overload of traffic on a single Ethernet adapter. Which of the following commands is best to identify a possible overload of the Ethernet adapter？（） ping。 iostat。 netstat。 ifconfig。
保费豁免保险是指保费支付人发生保险事故，经过一个等待期后，确认已经残废，未缴付的保费视为已缴付，保单继续有效的附加险。如果豁免保费一段时间后，被保险人不再残废，则（）。 只需缴纳主险保险费。 只需缴纳附加险保险费。 需继续缴纳主险、附加险的保费。 需补缴主险、附加险的保费。
Which command will display the current control key settings？（）
