Operating Systems Questions

Transferring the control from one process to other process requires saving the state of the old process and loading the saved state for new process. This task is known as context switching.

Commonly, the different attributes for a file structure are naming,size, identifier, a level of protection, supported file types and location for the files.

Local replacement means that an incoming page is brought in only to the relevant process address space. Global replacement policy allows any page frame from any process to be replaced. The latter is applicable to variable partitions model only.

swapping

interactive user request

timing

parent process request

In message passing, it is the condition in which, both, the sender and receiver are blocked until the message is delivered.

The `fork()’ used to create a new process from an existing process. The new process is called the child process, and the existing process is called the parent. We can tell which is which by checking the return value from `fork()’. The parent gets the child’s pid returned to him, but the child gets 0 returned to him.

Resident set is that portion of the process image that is actually in real-memory at a particular instant. Working set is that subset of resident set that is actually needed for execution. (Relate this to the variable-window size method for swapping techniques.)