Operating Systems Quiz #9: Virtual Memory and Page Replacement

Flashcards covering page faults, demand paging, virtual memory advantages, and page replacement algorithms like FIFO, OPT, and LRU based on Quiz #9.

The instruction that causes a __________ needs to be re-executed after the fault has been handled.

page fault

__________ initially allows a parent and child process to share the same pages.

Copy-On-Write (COW)

In __________, a page is loaded in memory only when it is needed during execution.

demand paging

One advantage of virtual memory is that a program can be much __________ than the size of physical memory.

larger

Virtual memory allows programmers to concentrate on programming the problem instead of worrying about the amount of __________ available.

physical memory

Virtual memory provides a way to execute a program that is only __________ loaded in memory.

partially

The __________ bit identifies a page that has been modified since it was loaded.

dirty (modify)

__________ page replacement is used mostly for comparison with other page-replacement schemes.

Optimal

Using the FIFO replacement algorithm on the page access string 12342341211314 with three frames results in __________ page faults.

8

Under FIFO, the final configuration of three frames for the reference string 1 2 3 4 2 3 4 1 2 1 1 3 1 4 is __________.

3, 1, 4

After the OPT algorithm is applied to the reference string 1 2 3 4 2 3 4 1 2 1 1 3 1 3 with three page frames, the final configuration is __________.

1, 2, 3

Given the reference string 1 2 3 4 2 3 4 1 2 1 1 3 1 4 and three page frames, the final configuration after the LRU algorithm is applied is __________.

3, 1, 4