单项选择题 A non-root user can run rsh commands from serverA to serverB， but attempts to run rsh  commands by the root user return with a permission error message. What action will resolve the problem？（）

单项选择题 An administrator has a server that must be upgraded from AIX 5.2 to AIX 5.3. The administrator also needs to use the 64-bit kernel with JFS2 filesystems in rootvg. All critical data resides in a non-rootvg volume group. Which of the following types of install could the administrator use to accomplish this？（）

单项选择题 An administrator just completed an AIX installation but suspects that not all filesets installed completely. Which of the following commands would verify that all filesets are completely installed？（）