Input Output Systems Questions

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51.

Which hardware triggers some operation after certain programmed count?

A

programmable interval timer

B

interrupt timer

C

programmable timer

D

none of the mentioned

Correct Answer: A

None.

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52.

The device-status table contains ____________

A

each I/O device type

B

each I/O device address

C

each I/O device state

D

all of the mentioned

Correct Answer: D

None.

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53.

Which buffer holds the output for a device?

A

spool

B

output

C

status

D

magic

Correct Answer: A

None.

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54.

Which one of the following connects high-speed high-bandwidth device to memory subsystem and CPU.

A

Expansion bus

B

PCI bus

C

SCSI bus

D

None of the mentioned

Correct Answer: A

None.

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55.

A process is moved to wait queue when I/O request is made with ____________

A

non-blocking I/O

B

blocking I/O

C

asynchronous I/O

D

synchronous I/O

Correct Answer: B

None.

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