计算机性能指标对用户非常重要，下列与计算机性能评测有关的叙述，不正确的是______。
- A.通常使用的综合评测指标有3类：工作量类、响应性能类、利用率类
- B.除综合评价指标外，评价系统性能的还有可靠性、可用性、可维护性等
- C.平均故障间隔时间MTBF越小，表示系统越可靠
- D.基准程序法benchmark，是一种常用的计算机性能测试方法
正确答案及解析
正确答案
解析
本题考查计算机性能评测方面的基础知识。计算机系统的性能指标对用户非常重要。评价一个计算机系统，通常使用的综合评测指标有3类：工作量类、响应性能类和利用率类。除上述综合评价指标外，评价系统性能的还有可靠性、可用性、可维护性、兼容性、开放性、可扩展性、安全性和性能价格比等。基准程序法benchmark，是目前使用较多的一种计算机性能测试方法。平均故障间隔时间(MTBF)用以表示系统平均无故障可正常运行的时间，是所选时段多次故障间隔时间的平均值，MTBF越大，表示系统越可靠。
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