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.

Show Suggested Answer

Suggested Answer: B, C, D

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

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Cassi

1 months ago

Option B is a bit of a stretch. The device allocator doesn't just assign devices willy-nilly, there are policies and security measures involved.

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Cyril

2 days ago

C) Option B is a bit of a stretch. The device allocator doesn't just assign devices willy-nilly, there are policies and security measures involved.

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Jennifer

6 days ago

B) In 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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Hollis

25 days ago

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

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Leanora

2 months ago

Ha! 'Exchanging numbers with processors' - I guess the exam writer was aiming for a bit of humor there. But option D doesn't seem quite right.

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Marget

2 months ago

I'm not sure about option D - I don't think all I/O devices use buffers to communicate with processors in modern OSes. That seems a bit oversimplified.

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Tamesha

5 days ago

User3: Option B also makes sense, assigning devices to processes securely.

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Dorsey

6 days ago

User2: I agree, that's an important task of device management.

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Marge

8 days ago

User1: I think option A is correct, it's about completing I/O requests by users.

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Stevie

12 days ago

User1: Yeah, that could definitely improve efficiency in device management.

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Launa

21 days ago

User3: Virtualizing a physical device into multiple logical devices sounds useful, like option C.

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Reed

1 months ago

User2: I think option B is more accurate, the device allocator assigns devices to processes securely.

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Nina

1 months ago

User1: I agree, option D does seem oversimplified.

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Elden

2 months ago

Hmm, option C seems to be the most accurate description of device management. Virtualizing physical devices into logical ones is a key aspect of modern OS design.

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