 |
| CPU for the entire duration: |
it was observed that a job does not need the CPU for the entire duration of its processing. This is because in addition to doing computation {for which CPU is needed}., a job often needs to perform I/O operations {such as reading or writing some data to a tape or disk, waiting for some data to be input from the keyboard, and printing some results} during the course of its processing. In fact, depending on the CPU utilization during the course of processing, jobs are broadly classified into the following two types