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Answer:
Following are the code in java language
abstract interface PointingDevice // interface PointingDevice,
{
// abstract method getXCoord()
public abstract int getXCoord();
// abstract method getYCoord()
public abstract int getYCoord();
// abstract method attentionRequired()
public abstract boolean attentionRequired();
// abstract method setResolution( )
public abstract double setResolution(double a);
}
Explanation:
In this code we have declared a abstract interface "PointingDevice" which contains the four abstract method getXCoord of type int , getYCoord() of type int , attentionRequired() of type boolean and setResolution() of type double .
These method have only declaration not definition any interface or class which inherit the inteface PointingDevice must define all these four method otherwise it also be abstract .
Answer:
Five focus areas for Green Computing are:
- Environmental conditions
- Information technology (IT) systems
- Cooling systems
- Electrical systems
- Air management systems
Explanation:
Green computing refers to the art of managing very effectively information technology such that the current level of productivity is maintained or exceeded.
Many of the factors listed above are more typical to data centers.
Data centers are IT systems that consume lots of electricity whilst generating lots of heat.
Sustained over a long period of time, the heat generated will contribute to green-house gases as the cooling system that is required to keep the data houses cool are big.
Hence, the green computing protocol requires where possible, minimal electricity be expended in cooling the data warehouses.
Another suggestion that has been given is for systems and appliances to be shut down when not in use rather than being left on or on standby.
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