Ais software that enables individual computers to access websites on the world wide web through a graphical user interface.

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

Use a physical stopwatch to record the length of time it takes to run the program. calculate the difference obtained by calls to the method system.currenttimemillis() just before the start of the algorithm and just after the end of the algorithm. calculate the difference obtained by calls to the method system.currenttimemillis() at the start of the program and at the end of the program so that the elapsed time includes the display of the result. use the value returned by the method system.currenttimemillis() just after the end of the algorithm as the elapsed time.

Match the function to its purpose. fast worth 50pts.