Application Io Interface 1 — Test 1
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Question 1
A ____ a set of wires and a rigidly defined protocol that specifies a set of messages that can be sent on the wires.
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Question 2
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 _________
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Question 3
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.
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Question 4
A ________ is a collection of electronics that can operate a port, a bus, or a device.
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Question 5
An I/O port typically consists of four registers status, control, ________ and ________ registers.
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Question 6
The ______ register is read by the host to get input.
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Question 7
The ______ register is written by the host to send output.
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Question 8
The hardware mechanism that allows a device to notify the CPU is called _______
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Question 9
The CPU hardware has a wire called __________ that the CPU senses after executing every instruction.
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Question 10
The _________ determines the cause of the interrupt, performs the necessary processing and executes a return from the interrupt instruction to return the CPU to the execution state prior to the interrupt.
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