Operating Systems - Processes and Scheduling

a. Give a practical way for a system using demand paging to determine whether there are processes that have too little RAM allocated to them. Include how the particular processes with insufficient allocation are identified, and justify that the methods you give are practical.

b. Assuming that the system from (a) has a memory scheduler, what factors should be considered when selecting a process to swap out, and how these factors should be used to select the process(es) to swap out.

c. How can such a system determine when a swapped-out process can safely be swapped back in? What factors should be taken into account in selecting a process to swap in, and how should they be used?