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Welcome to the DMA MCQs Page

Dive deep into the fascinating world of DMA with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of DMA, a crucial aspect of Microprocessor. In this section, you will encounter a diverse range of MCQs that cover various aspects of DMA, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Microprocessor.

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Check out the MCQs below to embark on an enriching journey through DMA. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Microprocessor.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of DMA. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

DMA MCQs | Page 2 of 7

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Q11.
The 8257 is able to accomplish the operation of
Discuss
Answer: (d).all of the mentioned
Q12.
The bus is available when the DMA controller receives the signal
Discuss
Answer: (b).HLDA
Q13.
To indicate the I/O device that its request for the DMA transfer has been honoured by the CPU, the DMA controller pulls
Discuss
Answer: (c).DACK (active low)
Q14.
If more than one channel requests service simultaneously, the transfer will occur as
Discuss
Answer: (c).burst transfer
Q15.
The continuous transfer may be interrupted by an external device by pulling down the signal
Discuss
Answer: (d).HLDA
Q16.
The number of clock cycles required for a 8257 to complete a transfer is

a.

2

b.

4

c.

8

d.

10

Discuss
Answer: (b).4
Q17.
In 8257, if each device connected to a channel is assigned to a fixed priority then it is said to be in
Discuss
Answer: (b).fixed priority scheme
Discuss
Answer: (a).rotating priority scheme
Q19.
The register of 8257 that can only be written in is
Discuss
Answer: (c).mode set register
Q20.
The operation that can be performed on the status register is
Discuss
Answer: (b).read operation
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