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單項選擇題

You are maintaining the PROD database of TeleSoft Corporation. You have initialized the following DB_BLOCK_CHECKING parameter in the init.ora file:  DB_BLOCK_CHECKING = TRUE;  What will be the result of setting this parameter?()

A. Only data blocks of the SYSTEM tablespace will be checked.
B. Only data blocks of the SYSAUX tablespace will be checked.
C. A checksum will occur only on the checkpoint.
D. A checksum will occur every time a block is modified.

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