Task 3

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

• CPU

• Monitor

• Wirefull

• Bus

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

• port

• node

• bus

• none of the mentioned

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 _________

• port

• daisy chain

• bus

• cable

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.

• Devices

• Buses

• Device drivers

• I/O systems

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

• controller

• driver

• host

• bus

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

• system in, system out

• data in, data out

• flow in, flow out

• input, output

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

• flow in

• flow out

• data in

• data out

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

• status

• control

• data in

• data out

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

• polling

• interrupt

• driver

• controlling

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

• interrupt request line

• interrupt bus

• interrupt receive line

• interrupt sense line