Question

This is a multiple answer question, meaning any number of the 4 statements could be true. From an O/S class

The term copy on write refers to what?

		The ability to read and write any resource we want in a system.
		The ability to change any resource we want in the system, since we are making our own local copy of that resource.
		The ability to read any resource we want in the system, as long as we don't write to it.
		The ability of child processes to read memory from their parent. If a modification needs to take place, each gets their own copy of the memory.

Answer 1

The term Copy-on-Write refers

The ability of child processes to read memory from their parent. If a modification needs to take place, each gets its own copy of the memory.

Copy-on-Write

• It is a resource management technique in which many callers wanted to use a particular data resource then no extra copies are created immediately for all the callers, instead, pointer references of the data resource is assigned for each of them.
• And whenever one of the users wanted to modify the data, then only the modified copy is created.