Operating System

Operating System

1. CPU

   • Modern processors can execute 4 billion instructions every second.
   • This is more than memory and secondary storage can keep up with
   • While a processor waits for other components to catch up, it is not doing anything
   • An OS will make use of this dead time by allocating CPU time to different processes
   • A process is a running application
   • Each application can run as if it is the only program on the system, and the operating system can allocate processor time as necessary, allowing multitasking

2. Multi-tasking