容错技术可以提高计算机系统的可靠性，利用元件冗余保证在局部故障情况下系统还可工作，其中带有热备份的系统称为双重系统，（）是双重系统的特点。
- A.两个子系统同时同步运行，当联机子系统出错时，由备份子系统接替
- B.备份子系统处于开机状态，一旦联机子系统出错，立即切换到备份子系统
- C.两个子系统交替处于联机和自检状态，当一个出错时，由另一系统工作
- D.两个子系统并行工作，一旦一个子系统出错，放弃同时工作
正确答案及解析
正确答案
解析
本题考查计算机容错技术方面的基础知识。容错技术可以提高计算机系统的可靠性，利用元件冗余保证在局部故障情况下系统还可工作，其中带有热备份的系统称为双軍系统。双重系统中，两个子系统同时同步运行，当联机子系统出错时，由备份子系统接替。
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