To indicate the I/O device that its request for the DMA transfer has been honored by the CPU, the DMA controller pulls

A)
HRQ signal
B)
DACK (active low)
C)
HLDA signal
D)
DACK (active high)

Correct Answer : Option (B) :   DACK (active low)

Explanation : The DACK (active low) line of the used channel is pulled down by the DMA controller to indicate the I/O device that its request for the DMA transfer has been honored by the CPU.

Recently Updated in Microprocessors Questions
If I = J = K = 13, then in Fortran 1 = 10 - (1 / 10) * 10 + (J / 5) * 4 + K ** (- 2) is equal to
A)
5
B)
6
C)
7
D)
8

Correct Answer :   8

In the dimension statement DIMENSION A (50, 50), K (100, 100) the total number of locations reserved will be
A)
2500
B)
100000
C)
125000
D)
250000

Correct Answer :   125000

In super computers the extra level of primary memory is generally called
A)
Single stage device
B)
Digital state device
C)
Solid state device
D)
Surface stage device

Correct Answer :   Solid state device

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