A system administrator boots a server in normal mode, the boot process displays and LED 551 and stops. LED 551 indicates the root volume group is being varied on. All of the following are probable causes of the problem EXCEPT:（） The bosboot command failed to complete.。 The JFS log device is corrupted.。 The initttab file is corrupted.。 The /dev entries or /etc files are missing.。
以下（）操作不是在拆除开孔机前完成的。 A、提起筒刀 。 B、提起塞柄 。 C、关闭夹板阀 。 D、卸下筒刀。
A System p administrator needs to upgrade a system from AIX 5.2 to AIX 5.3. Which of the following installation methods would minimize downtime（） Migration installation。 Partition Mobility。 alt_disk_install。 update_all smit fastpath and reboot during the next scheduled outage。
When dividing an existing Class B network into 2 subnets of 32，766 hosts each， which of the following subnet masks should be used？（） 128.0.0.0。 255.128.0.0。 255.254.0.0。 255.255.128.0。
从主要环境影响减缓措施的角度，对于典型工业行业可根据（）从原料输入、工艺流程、产品使用等进行分析，提出替代方案与减缓措施。 清洁生产。 能源转换技术。 热能集中处理。 循环经济。 生物多样性保护。
Which of the following statements is TRUE about the primary system dump device?（）
