单项选择题 A system administrator has just applied an update to an AIX system to correct a problem, The APAR number is IX49035 and was shipped as part of the PTF number U437542. After applying the APAR fix, the administrator wants to ensure that the fix is applied before informing the system users of the corrected problem. Which of the following commands should the system administrator run to verify that the APAR fix has been applied to the system?（）

单项选择题 A system administrator is in the process of performing a preservation installation. However, the machine keeps booting up in diagnostic mode. Which of the following is the most probable cause?（）

单项选择题 Which of the following procedures correctly lists the prerequisite software that requires installation with an AIX licensed program product?（）