单项选择题
A. The Oracle database will check all data blocks by going through the data on each block， making sure the data is self-consistent.
B. The DBWn and the direct loader will calculate a checksum and store it in the cache header of every data block when writing it to disk.
C. The Oracle database will check data blocks belonging to the SYSTEM tablespace only， by going through the data on each block， making sure the data is self-consistent.
D. The Oracle database will check data blocks belonging to the SYSAUX tablespace only， by going through the data on each block， making sure the data is self-consistent.
E. The Oracle database will check data blocks in the SYSTEM and SYSAUX tablespaces only， by going through the data on each block， making sure the data is self-consistent.
单项选择题 YouworkasadatabaseadministratoratCertkiller.com.YourproductiondatabaseusesanAutomaticStorageManagement（ASM）instancetomanageitsfiles.YouwanttoaddanewdiskgrouptotheASMinstancetomanagetheincreaseddataload.WhatactionwouldyouperformtoincludethenewdiskgroupintheASMinstancewithoutcausinganyimpactonthecurrentlyconnectedusers？（）
单项选择题 Exhibit， One of the important tables in the USERStablespace was dropped and purged from the recycle bin at 9：00 a.m. You noticed this at 11：00 a.m. and you want to perform an incomplete recovery to recover the table. Which statement is true？（）
单项选择题 Whiledesigningyourdatabase，youhavecreatedtheEMPLOYEEStableasanindex-organized（IOT）.YouwanttocreateabitmapindexontheJOD_IDcolumntomakequeriesfaster.Whichtaskmusthavebeencompletedsothatyouareabletocreatethebitmapindex？（）