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试卷名称:CISSP认证考试（安全体系结构和设计）模拟试卷1

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There are different ways that operating systems can carry out software I/O procedures. Which of the following is used when the CPU sends data to an I/O device and then works on another process’s request until the I/O device is ready for more data?

A．I/O using DMA

B．Interrupt-driven I/O

C．Programmable I/O

D．Premapped I/O

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There are different ways that operating systems can carry out software I/O procedures. Which of the following is used when the CPU sends data to an I/O device and then works on another process’s request until the I/O device is ready for more data? I/O using DMA Interrupt-driven I/O Programmable I/O Premapped I/O

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