Review Problems Chapter 7

[Tailssan]

Review Question 7.2:

Q; Why is the capability to relocate processes desirable?

A: Being able to constantly swap processes that are ready to execute in and out of main memory will maximize CPU Utilization. When these processes are swapped to and from main memory / disk they don't always return to the same memory location, therefore being able to relocate processes is very efficient and desirable.

[ngerstle]

Review problem 7.3:
Why is it not possible to enforce memory protection at compile time?
The memory space required for data, stack, etc, is not known when the program is compiled- this is the same reason we use dynamic memory allocation structures- vectors, arraylists, etc.

[wleavenw]

Review 7.6: What is the difference between internal and external fragmentation?

Internal fragmentation is when there is wasted space inside a partition, such as when a process is allocated more memory than it needs. External fragmentation is when there is wasted space outside a partition, which can happen when processes tend to be placed with small gaps between them.