# Context switches - Example - Operating System

**Q. Three CPU intensive processes requires 10, 20 and 30 time units and arrive at times 0, 2 and 6 respectively. The operating system implements a shortest remaining time first scheduling algorithm. Considering that the context switches at time zero and at the end are not counted the number of context switches are needed is ______.***- Published on 27 Aug 15***a.** 4

**b.** 3

**c.** 2

**d.** 1

**ANSWER: 2**