Huawei Exam H12-711_V4.0 Topic 1 Question 12 Discussion

Actual exam question for Huawei's H12-711_V4.0 exam

Question #: 12
Topic #: 1

What is correct about the following description of device management in the operating system?

AThe main task of port device management is to complete the I/O requests made by users and classify I/O devices for users.

BWhenever a process makes an I/O request to the system, as long as it is secure, the device allocator will assign the device to the process according to a certain policy.

CDevice management can virtualize a physical device into multiple logical devices through virtualization technology, providing multiple user processes to use.

DIn order to alleviate the problem of speed mismatch between CPU and I/O devices and improve the parallelism of CPU and I/O devices, in modern operating systems, almost all I/O devices are exchanging numbers with processors
Buffers are used at all times.

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Suggested Answer: B, C, D

by Ettie at Mar 02, 2023, 06:35 AM

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22 days ago

I think option A is correct because it mentions completing I/O requests made by users.

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