DMA test Q
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2018 asked Jan 7, 2017 • closed Jan 7, 2017 by 2018

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ajayraho asked Nov 21, 2023

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COA - DMA
A hard disk with a transfer rate of 1 Mbytes/ second is constantly transferring data to memory using DMA. The processor runs at 500 MHz, and takes 500 and 1000 clock cycles to initiate and complete DMA transfer respectively. If the size of the transfer is 1 Kbytes, what is the percentage of processor time consumed for the transfer operation?________(Rounded off to three decimal)

A hard disk with a transfer rate of 1 Mbytes/ second is constantly transferring data to memory using DMA. The processor runs at 500 MHz, and takes 500 and 1000 clock cycl...

ajayraho

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ajayraho asked Nov 21, 2023

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piyushkandari asked Aug 13, 2023

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COA DMA
Consider a device operating on 8MBPS speed and tranferring the data to memory using cycle stealing mode of DMA.If it takes 250nsec to tranfer 16 bytes data to memory when it is ready/prepared.Then the percentage of time CPU is blocked due to DMA is?

Consider a device operating on 8MBPS speed and tranferring the data to memory using cycle stealing mode of DMA.If it takes 250nsec to tranfer 16 bytes data to memory when...

piyushkandari

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piyushkandari asked Aug 13, 2023

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h4kr asked Jan 31, 2023

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DMA stealing mode, where does extra 40ns come from?
Consider a disk with 4000 RPM rotational speed. The disk has 1K sectors on each track with 1k capacity of each sector. The disk is operating on the cycle stealing mode of DMA. It takes 50 nsec to transfer the 16 B data from disk to ... to DMA? This is the question here is the solution Can you tell where the 40ns which I have circled comes from??

Consider a disk with 4000 RPM rotational speed. The disk has 1K sectors on each track with 1k capacity of each sector. The disk is operating on the cycle stealing mode of...

h4kr

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h4kr asked Jan 31, 2023

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Chaitanya Kale asked Sep 24, 2022

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DMA
The below question is from Made Easy Test series The diagram shows single bus detached DMA configuration for a system. How many times system bus is used for single data transfer using DMA(Consider only data transfer, not command or status transfer) 1 2 3 0 Here answer ... My Doubt: In DMA their is direct data transfer from i/o to memory so system bus is accessed only once. Is this correct?

The below question is from Made Easy Test seriesThe diagram shows single bus detached DMA configuration for a system. How many times system bus is used for single data tr...

Chaitanya Kale

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Chaitanya Kale asked Sep 24, 2022

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DMA test Q
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