OS I/O Systems
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.
interrupt request line
device driver
interrupt handler
all of the mentioned
interrupt handler
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Caching ____________A. holds a copy of the data
B. is fast memory
C. holds the only copy of the data
D. holds output for a device
A ________ is a full duplex connection between a device driver and a user level process.
A. Bus
B. I/O operation
C. Stream
D. Flow
The _________ are reserved for events such as unrecoverable memory errors.
A. non maskable interrupts
B. blocked interrupts
C. maskable interrupts
D. none of the mentioned
Caching is ________ spooling.
A. same as
B. not the same as
C. all of the mentioned
D. none of the mentioned
Buffering is done to ____________
A. cope with device speed mismatch
B. cope with device transfer size mismatch
C. maintain copy semantics
D. all of the mentioned
The ______ register is written by the host to send output.
A. status
B. control
C. data in
D. data out
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
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