You plan to control the sessions performing a huge number of I/O operations. Your requirement is to kill the session when it exceeds a specified number of I/Os. Which statement describes a solution to the above?（） Set a threshold for the default system-defined moving window baseline.。 Add directives to the Automatic Database Diagnostic Monitor (ADDM).。 Modify the profile for the targeted users for which control needs to be imposed.。 Implement the database resource manager to add the SWITCH_IO_REQS and SWITCH_GROUP directives.。
大二男生王某，经常会想一些没有意义的问题，比如，一个定理为什么这样理解，而不那样理解，明明知道那样理解是与事实不符合，也知道书上说的是对的，但老是想„„这种情况严重影响正常生活，为此他感到非常苦恼。该生出现的症状主要体现在（）。 情绪方面。 行为方面。 观念方面。 意向方面。
You configured the Flash Recovery Area （FRA） for your database. The database instance is running inARCHIVELOG mode. The default location for the archived redo log files is the Flash Recovery Area. Which twofiles are removed automatically if the space is required in the FRA as per the retention policy（） Flashback log files。 Backups that have become obsolete。 User managed backups of the data files and control files。 Archived redo log files that have multiple copies in a different archive location and not backed u。
Given: Which statement is true?（） 420 is the output.。 An exception is thrown at runtime.。 All constructors must be declared public.。 Constructors CANNOT use the private modifier.。 Constructors CANNOT use the protected modifier.。
简述科赫原则。（如何判定某种微生物是病原菌？）
估算重置成本可以选择物价指数法和重置核算法，两种方法的区别在于（）。
