Input Output Systems Questions

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11.

If one or more devices use a common set of wires to communicate with the computer system, the connection is called ______

A

CPU

B

Monitor

C

Wirefull

D

Bus

Correct Answer: D

None.

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12.

A ____ a set of wires and a rigidly defined protocol that specifies a set of messages that can be sent on the wires.

A

port

B

node

C

bus

D

none of the mentioned

Correct Answer: C

None.

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13.

When device A has a cable that plugs into device B, and device B has a cable that plugs into device C and device C plugs into a port on the computer, this arrangement is called a _________

A

port

B

daisy chain

C

bus

D

cable

Correct Answer: B

None.

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14.

The _________ present a uniform device-access interface to the I/O subsystem, much as system calls provide a standard interface between the application and the operating system.

A

Devices

B

Buses

C

Device drivers

D

I/O systems

Correct Answer: C

None.

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15.

A ________ is a collection of electronics that can operate a port, a bus, or a device.

A

controller

B

driver

C

host

D

bus

Correct Answer: A

None.

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16.

An I/O port typically consists of four registers status, control, ________ and ________ registers.

A

system in, system out

B

data in, data out

C

flow in, flow out

D

input, output

Correct Answer: B

None.

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17.

The ______ register is read by the host to get input.

A

flow in

B

flow out

C

data in

D

data out

Correct Answer: C

None.

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18.

The ______ register is written by the host to send output.

A

status

B

control

C

data in

D

data out

Correct Answer: D

None.

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19.

The hardware mechanism that allows a device to notify the CPU is called _______

A

polling

B

interrupt

C

driver

D

controlling

Correct Answer: B

None.

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20.

The CPU hardware has a wire called __________ that the CPU senses after executing every instruction.

A

interrupt request line

B

interrupt bus

C

interrupt receive line

D

interrupt sense line

Correct Answer: A

None.

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