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2016年下半年 上午试卷 综合知识
第 71 题
关键词 OS  
章/节 计算机专业英语  
 
 
A real-time operating system. (RTOS) is an operating system intended to serve (71) application process data as it comes in, typically without buffering delays. A key (72) of a RTOS is the level of its consistency concerning the amount of time it takes to accept and complete an application抯 task; the variability is jitter. A hard real-time operating system has (73) jitter than a soft real-time operating system. The chief design goal is not high throughput, but rather a guarantee of a soft or hard performance category. A RTOS has an advanced algorithm for scheduling. (74) flexibility enables a wider, computer-system orchestration of process priorities, but a real-time OS is more frequently dedicated to a narrow set of applications. Key factors in a real-time OS are minimal (75) latency and minimal thread switching latency.
 
  A.  normal
 
  B.  real-time
 
  C.  user
 
  D.  kernel




 
 
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