Answer:
last known good configuration
Explanation:
If you're having difficulties starting Windows, the Last Known Good Configuration, or LKGC for short, is a technique to get it started. It loads the drivers and registry data from the last time you began and shut down your computer successfully.
A spacecraft virus<span> is a type of bacteria virus that feeds on other bacteria. It got it name because it is mostly shaped like a spacecraft.</span>
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.
