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89860 篇文章 33 次评论单选题：Which of following operations will make a process change from us
Which of following operations will make a process change from user mode to kernel mode? @[B](1)I Divide by zero II…
单选题：Which of the following instructions should not be privileged?
Which of the following instructions should not be privileged? @[B](1)A. Turn off interrupts. B. Read the clock.…
单选题：Which is not able to solve the race condition?
Which is not able to solve the race condition? @[B](1)A. Test and Set Lock B. Shared memoryC. Semaphore D. MonitorA.Test…
单选题：Which of the following statements is incorrect?
Which of the following statements is incorrect? @[C](1)A. Virtual machines provide a robust level of security.B. Virtua…
单选题：A system call is_____ 。
A system call is_____ 。 @[D](1)A. a user written sub-program B. a library program in advanced languageC. a comman…
单选题：The interfaces the operating system provides to the programmers
The interfaces the operating system provides to the programmers are_____. @[B](1)A. processes B. system c…
单选题：Operating systems provide certain levels of interfaces. However,
Operating systems provide certain levels of interfaces. However, _____ is in general not provided by OS. @[A](1)A. Appl…
单选题：Multi-programming can improve the ___________ of CPU and I/O dev
Multi-programming can improve the ___________ of CPU and I/O devices. @[A](1)A. utilization B. reliability C.…
单选题：Which of following activities is not what an operating system co
Which of following activities is not what an operating system concerns? @[D](1)A. To manage the computer hardwareB. To p…
单选题：Users can create and destroy process by __________.
Users can create and destroy process by __________. @[B](1)A. function invocation B. macro instructionC. system calls D.…