C)Hydroelectric I believe.
I can't get what do you need, but I guess it's a part of java code. I can explain what it means. It's used to unite two rising sorted arrays which are list1 and list2. The result is stored in result array. I suggest you to clearly explain your task as it's difficult to give you correct answer.
Embedded.
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Real-time is for thing like your thermostat (Nest) etc.
Distributed is for huge number crunching supercomputers.
Multi-user would mean more than one person was using the device at the same time with a different device.</span>
