June 12, 2021

DMA MCQ’s

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This set of Embedded System Multiple Choice Questions & Answers (MCQs) focuses on “DMA”.

1. Which of the following can be adopted for the systems which does not contain DMA controller for data transmission?
a) counter
b) timer
c) polling
d) memory

2. Which signal allows the DMA controller to select the peripheral?
a) local peripheral control
b) global peripheral control
c) address bus
d) data bus

3. Which of the following of a generic DMA controller contain a base address register and an auto-incrementing counter?
a) address bus
b) data bus
c) bus requester
d) address generator

4. Which signal can identify the error?
a) data bus
b) address bus
c) bus requester
d) interrupt signal

5. How many classifications of DMA controllers are made based on the addressing capability?
a) 2
b) 3
c) 4
d) 5

6. Which of the following provides an efficient method for transferring data from a peripheral to memory?
a) dma controller
b) serial port
c) parallel port
d) dual port

7. Which of the following have low-level buffer filling?
a) output
b) peripheral
c) dma controller
d) input

8. Which of the following is used to transfer the data from the DMA controller to the destination?
a) data bus
b) address bus
c) request bus
d) interrupt signal

9. Which of the following is used to request the bus from the main CPU?
a) data bus
b) address bus
c) bus requester
d) interrupt signal

10. How many address register are there for the 1D type DMA controller?
a) 1
b) 2
c) 3
d) 4

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