Computer Organization & Architecture (3140707) MCQs

MCQs of Input-Output Organization

Showing 21 to 20 out of 30 Questions
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21.
The daisy-chaining method is another name of ____________.
(a) polling
(b) serial connection of priority interrupt
(c) parallel connection of priority interrupt
(d) none of above
Answer:

Option (b)

22.
In daisy-chaining method, when no interrupts are pending, the interrupt line (INT) stays in __________.
(a) low-level
(b) depends on previous interrupt
(c) high-level
(d) level which is decided by CPU
Answer:

Option (c)

23.
VAD in daisy-chaining method stands for?
(a) Vector address
(b) Vector address destination
(c) Validity of address
(d) None of above
Answer:

Option (a)

24.
For what values of PI & PO, the device places its VAD on the data bus?
(a) 0, 1
(b) 0, 0
(c) 1, 1
(d) 1, 0
Answer:

Option (d)

25.
Which signal is used by the DMA controller to request the CPU to relinquish control of the buses?
(a) BG
(b) BR
(c) RS
(d) DS
Answer:

Option (b)

26.
Which is one of the types of DMA transfer?
(a) Burst transfer
(b) Cycle stealing
(c) Address transfer
(d) Both A & B
Answer:

Option (d)

27.
Which of the following signal is input to DMA controller?
(a) BR
(b) BG
(c) interrupt
(d) DMA acknowledge
Answer:

Option (b)

28.
Which register is used to hold the number of words to be transferred in DMA?
(a) Word count register
(b) Counter register
(c) Control register
(d) Memory count register
Answer:

Option (a)

29.
Which operation is done at first from CPU to IOP for proper communication?
(a) Request IOP status
(b) Prepare status report
(c) Send instruction to test IOP path
(d) Send start I/O instruction
Answer:

Option (c)

30.
Which operation is not performed by CPU in CPU-IOP communication?
(a) Test IOP path
(b) Check status word
(c) Request IOP path
(d) Prepare status report
Answer:

Option (d)

Showing 21 to 20 out of 30 Questions
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