title: Context Switch questions: What part of the OS is involved in managing the Context Switch?
body: <p>I was asked to anwer these questions about the OS context switch, the question is pretty tricky and I cannot find any answer in my textbook:</p>
  
  <ol>
  <li>How many PCBs exist in a system at a particular time?</li>
  <li>What are two situations that could cause a Context Switch to occur? (I think they are interrupt and termination of a process,but I am not sure )</li>
  <li>Hardware support can make a difference in the amount of time it takes to do the switch.   What are two different approaches?</li>
  <li>What part of the OS is involved in managing the Context Switch? </li>
  </ol>