单选题 An example of a system resource that is controlled and monitored by the OS is:

A、 CPU.

B、 Memory.

C、 Files.

D、 Both A and B

E、 All of the above.

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单选题 System calls can be run in either user mode or kernel mode.

A、True

B、False

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单选题 A system call bypasses the OS to access hardware.

A、True

B、 False

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单选题 During the instruction cycle of the CPU, the program counter is incremented after each instruction that is fetched to maintain the correct point of execution.

A、True

B、 False

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单选题 A microkernel is a kernel that:

A、 Contains many components that are optimized to reduce resident memory size.

B、 Is compressed before loading in order to reduce its resident memory size.

C、 Is compiled to produce the smallest size possible when stored to disk.

D、 Is stripped of all nonessential components.

E、 None of the above.

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单选题 Which is not one of the major categories of system calls?

A、 Process control.

B、 Communications.

C、 File manipulation.

D、 Security.

E、 All of the above are major categories of system calls.

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单选题 Simulation is the same as emulation.

A、True

B、False

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单选题 A boot block:

A、 Only knows the location and length of the rest of the bootstrap program.

B、 Is sophisticated enough to load the operating system and begin its execution.

C、 Is composed of multiple disk blocks.

D、 Determines which operating system will be loaded.

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单选题 The main function of the command interpreter is:

A、 To handle the files in the operating system.

B、 To provide the interface between the API and application program.

C、 To get and execute the next user-specified command.

D、 All of the above.

E、 None of the above.

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