单项选择题
A. Create a custom pre/post event.
B. Add a custom user defined event.
C. Define custom error notification.
D. Modify the test application server.
单项选择题 Automaticerrornotificationcanbeconfiguredtomanagewhichtypeofdiskerror？（）
单项选择题 While reviewing the hacmp.out after a node failure，an administrator realizes that the custom Event queue_down did not execute. The queue_down event shows up when a list of custom events is displayed. What would be the next logical step to resolve this problem？（）
单项选择题 The IP subsystem fallover behavior of a two-node cluster is being testing in a large client organization. One of the tests is to simulate a network_down event and verify that HACMP movesthe single resource group to the standby node. What is the best way to simulate a network down condition？（）