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GATE | GATE CS 2020 | Question 13
Consider the following statements.
- I. Daisy chaining is used to assign priorities in attending interrupts.
- II. When a device raises a vectored interrupt, the CPU does polling to identify the source of interrupt.
- III. In polling,the CPU periodically checks the status bits to know if any device needs its attention.
- IV. During DMA, both the CPU and DMA controller can be bus masters at the same time.
(A)
Ⅰ and Ⅱ only
(B)
Ⅰ and Ⅳ only
(C)
Ⅰ and Ⅲ only
(D)
Ⅲ only
Answer
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