This document appears to contain past exam questions and answers related to operating systems. It includes specimen exam questions from 2010, 2011, and 2012 on operating systems topics, along with the answers. One question addresses job priorities in an operating system, noting that high priority jobs can interrupt lower priority jobs.
29. JUNE 2012 Question 1 - ANSWERS
Q1bi)
Jobs may have different priorities (high priority/low priority)
A high priority job will be able to jump in front of lower priority
jobs