ビジネス データベースのトランザクション レコードが誤って削除され、システム オペレータはスナップショット コピーから復元することにしました。次のどれが、最良のトランザクションが正常に回復されたことを保証しますか。
正解:B
Recounting the transaction records to ensure no records are missing provides assurance that the best transactions were recovered successfully from a snapshot copy. This is because recounting the transaction records can verify that the number of records in the restored database matches the number of records in the snapshot copy, which represents the state of the database before the deletion occurred. Recounting the transaction records can also detect any data corruption or inconsistency that may have occurred during the restore process1.
Reviewing transaction recovery logs to ensure no errors were recorded is not the best answer, because transaction recovery logs may not capture all the details or issues that may affect the data quality or integrity. Transaction recovery logs are mainly used to monitor and troubleshoot the restore process, but they may not reflect the actual content or accuracy of the restored data2.
Rerunning the process on a backup machine to verify the results are the same is not the best answer, because rerunning the process may introduce additional errors or inconsistencies that may affect the data quality or integrity. Rerunning the process may also consume more time and resources than necessary, and it may not guarantee that the results are identical to the original data3.
Comparing transaction values against external statements to verify accuracy is not the best answer, because external statements may not be available or reliable for all transactions. External statements are documents or reports that provide information about transactions from a third-party source, such as a bank, a vendor, or a customer. However, external statements may not cover all transactions, or they may have different formats, standards, or timeliness than the internal data