List two challenges an operating system faces when passing parameters between user and kernel mode. describe how an operating system can overcome them.

The main challenge an operating system faces is keeping the operating system within the secured or fixed time limit of a real-time system. If the system doesn't finish a task within a certain give time frame, this may create an issue in the entire system it is running. Hence, when writing an operating system intended for a real-time system, the writer have to be certain that his scheduling tactics don't let response time to exceed the time constraint. 

Answer: this depends on the amount required to pay off the individual's card as well as how large the minimum payments are.if the amount is significantly large and the minimum payments are significantly small, then it will take a longer time to pay off the credit card.if the amount is significantly small and the minimum payments are significantly large, then it will take less time to pay off the credit card.hence, it would be difficult to answer true or false to this statment.however, for the purpose of this statement, it is most likely assumed that regardless of the amount to pay off the credit card the minimum payments would be quite large.therefore, the better option would be to pick 'true' as your answer.hope this ! : )have a lovely day! < 3