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NEW QUESTION: 1
When troubleshooting duplex mismatches, which two are errors that are seen on the half duplex end? (Choose two.)
A. FCS errors
B. runts
C. excessive collisions
D. late collisions
Answer: C,D
NEW QUESTION: 2
You upgraded from a previous Oracle database version to Oracle Database version to Oracle Database
12c. Your database supports a mixed workload. During the day, lots of insert, update, and delete operations are performed. At night, Extract, Transform, Load (ETL) and batch reporting jobs are run. The ETL jobs perform certain database operations using two or more concurrent sessions.
After the upgrade, you notice that the performance of ETL jobs has degraded. To ascertain the cause of performance degradation, you want to collect basic statistics such as the level of parallelism, total database time, and the number of I/O requests for the ETL jobs.
How do you accomplish this?
A. Enable SQL tracing for the queries in the ETL and batch reporting queries and gather diagnostic data from the trace file.
B. Enable real-time SQL monitoring for ETL jobs and gather diagnostic data from the V$SQL_MONITOR view.
C. Enable real-time database operation monitoring using the DBMS_SQL_MONITOR.BEGIN_OPERATION function, and then use the DBMS_SQL_MONITOR.REPORT_SQL_MONITORfunction to view the required information.
D. Examine the Active Session History (ASH) reports for the time period of the ETL or batch reporting runs.
Answer: C
Explanation:
Explanation/Reference:
Explanation:
* Monitoring database operations
Real-Time Database Operations Monitoring enables you to monitor long running database tasks such as batch jobs, scheduler jobs, and Extraction, Transformation, and Loading (ETL) jobs as a composite business operation. This feature tracks the progress of SQL and PL/SQL queries associated with the business operation being monitored. As a DBA or developer, you can define business operations for monitoring by explicitly specifying the start and end of the operation or implicitly with tags that identify the operation.
NEW QUESTION: 3
あなたはデータベースアプリケーションを開発するためにMicrosoft SQL Server2012を使用しています。あなは行を変更することができるdbo.ModifyDataという名前のストアドプロシージャを作成します。
あなたはトランザクションが失敗したときに、dbo.ModifyDataが次の要件を満たしていることを確認する必要があります:
* エラーを返しません
* すべて開いているトランザクションを閉じます
どのTransact-SQLのステートメントは使用すべきか。
A. BEGIN TRANSACTIONBEGIN TRYEXEC dbo.ModifyDataCOMMIT
TRANSACTIONEND TRYBEGIN CATCHIF @@ERROR != 0ROLLBACK
TRANSACTION;THROW;END CATCH
B. BEGIN TRANSACTIONBEGIN TRYEXEC dbo.ModifyDataCOMMIT
TRANSACTIONEND TRYBEGIN CATCHIF @@ TRANCOUNT = 0ROLLBACK
TRANSACTION;END CATCH
C. BEGIN TRANSACTIONBEGIN TRYEXEC dbo.ModifyDataCOMMIT
TRANSACTIONEND TRYBEGIN CATCHIF @@ERROR != 0ROLLBACK
TRANSACTION;END CATCH
D. BEGIN TRANSACTIONBEGIN TRYEXEC dbo.ModifyDataCOMMIT
TRANSACTIONEND TRYBEGIN CATCHIF @@TRANCOUNT = 0ROLLBACK
TRANSACTION;THROW;END CATCH
Answer: C