UNIX Programming and Technical

Q. What are states that the page can be in, after causing a page fault?

A. On a swap device and not in memory,
On the free page list in the main memory,
In an executable file,
Marked demand zero
Marked demand fill''.

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UNIX Other Question

Q. What does the swapping system do if it identifies the illegal page for swapping?

A. If the disk block descriptor does not contain any record of the faulted page, then this causes the attempted memory reference is invalid and the kernel sends a Segmentation violation signal to the offending process. This happens when the swapping system identifies any invalid memory reference Q. In what way the validity fault handler concludes?

A. It sets the valid bit of the page by clearing the modify bit.
It recalculates the process priority.