While setting up the threshold for tablespace space usage metrics for one of your tablespaces， you define the critical threshold as 60% and warning threshold as 75%. What would be the result of this setting？（） It would result in an error because the warning threshold cannot be more than the critical threshold.。 The warning threshold is ignored and alerts would be generated when space usage exceeds the critical threshold.。 The critical threshold is ignored and alerts would be generated when space usage exceeds the warning threshold.。 Both threshold values are used and alerts are generated when space usage exceeds the respective threshold values.。
IT服务管理的目标是（） 服务可量化度量。 以客户为中心。 实现约定的服务质量和成本。 保持与顾客的良好关系。
You work as a database administrator for Certkiller .com. You received the following error while working on your database： ORA-01555： snapshot too old In which situation would you receive such an error？（） You performed rollback after commit.。 If a log switch occurs in your database.。 Thearchiverfails to generate an archived log file.。 Instance recovery fails to find one of the redo log files.。 A long-running query is unable to get read-consistent image.。 If you perform manual undo management operations in auto mode.。
You have applications that have frequently executed queries， and produce small and static result sets. You configure the sqlnet.ora file in the client machine to set a nonzero value for the OCI_RESULT_CACHE_MAX_SIZE parameter. What is the purpose of this configuration？（） to avoid round trips to the server by enabling caching of query results in client memory。 to improve performance by storing a copy of the data from the private SQL area of the PGA。 to enhance the query performance by creating a cache in the client memory for sorting operations。 to avoid the storing of query plans and results in the server by creating a cache in the client memory。
膨胀/压缩机前、后轴承振动报警为（）停机为（） 20um，32um。 22um，34um。 25um，38um。
You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows： Warning （%）： 90
Critical （%）： 95
Which background process is responsible for issuing alerts when the threshold is crossed（）
