[单选] The DB_BLOCK_CHECKINGinitialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）

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.

You are working on a CATDB database that contains an Oracle Database version 11.1 catalog schema owned by the user RCO11. The INST1 database contains an Oracle Database version 10.1 catalog schema owned by the user RCAT10. You want the RMAN to import metadata for database IDs 1423241 and 1423242， registered in RCAT10， into the recovery catalog owned by RCO11. You also want to deregister them from the catalog after import. You executed the following commands to achieve this： RMAN> CONNECT CATALOG rco11/password@catdb RMAN> IMPORT CATALOG rcat10/oracle@inst1 DBID=1423241，1423242； What happens if the RCO11 catalog has scripts with the same name as that of the scripts in RCAT10 catalog？（） The scripts in the RCO11 catalog are overwritten.。 RMAN renames the local stored scripts in the RCO11 catalog.。 The RMAN session in which the command is executed aborts.。 RMAN renames the global scripts that are imported from the RCAT10 catalog.。边界摩擦 1927年4月，上海工人武装起义后不到半个月，蒋光慈就完成了中篇小说《（）》。《（）》文字简练，风格朴素，人物生动，内容深刻，是柔石最为优秀的小说。男性，45岁，施工中因房屋倒塌，被埋在泥土中，伤肢严重肿胀，组织广泛缺血与坏死。此时的损伤多为（）扭伤。挫伤。挤压伤。冲击伤。爆震伤。 The DB_BLOCK_CHECKINGinitialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）

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[单选] The DB_BLOCK_CHECKINGinitialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）

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