Fissure because it's like a large gaping crack in the earth
NaOH is not a compound because it contains three instead of two.
Servicing the interrupt
An interrupt is the signal to the processor from the hardware which say something about the problem that needs attention. This alerts the processor to respond and command an appropriate action to the problem. This can be done by suspending activities, saving current state and executing the interrupt handler. The interruption is just temporary after finishing the problem the processor will start again the normal activities.
