Answer:
Attenuation.
Explanation:
Attenuation means a gradual reduction in the strength of a signal as it moves from station to station which may even cause the receiving station to misinterpret the signal. Any signal can be attenuated - digital or analog.
Attenuation is often caused by weakness, fatigue or passiveness of networking cables and connectors. It could also be caused by noise and long distance.
To get around this, the network device(s) will often resend signals multiple times over just to ensure that at least one of the signals gets there and is interpreted correctly.
You need answers to the question
Answer:
previousAddition instance variable
Explanation:
In order to accomplish this you would need to add a previousAddition instance variable. In this variable you would need to save the amount that was added at the end of the process. Therefore, if a mistake were to occur you can simply call the previousAddition variable which would have that amount and subtract it from the total. This would quickly reverse the mistake, and can be easily called from the undo() method.
