Operating System (OS)
Daisy chain is a device for

interconnecting a number of devices to a number of controllers
None of these
connecting a number of devices to a controller
connecting a number of controllers to a device
All of these

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Operating System (OS)
Memory

is a sequence of instructions
is typically characterized by interactive processing and time-slicing of the CPU
is a device that performs a sequence of operations specified by instructions in memory.
is the device where information is stored
None of these

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Operating System (OS)
Semaphores

synchronize critical resources to prevent deadlock
are used for memory management
None of these
are used to do I/O
synchronize critical resources to prevent contention

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