In the context of semaphores, an atomic operation:   options: a must be implemented on a device that has been "hardened" against disruption by cosmic radiation b can be combined with other atomic operations into what are commonly known as molecules c will cause a signal to be thrown if run on a machine with an insufficient number of processors d is a sequence of two or more operations that can only be executed as a single unit

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Q: To multitask is to be able to do many tasks at once

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