## A two-level memory system has eight virtual pages on a disk to be mapped into four page frames {PFs) in the main memory. A certain program generated the following page trace:

A two-level memory system has eight virtual pages on a disk to be mapped into four page frames {PFs) in the main memory. A certain program generated the following page trace:

(a) Show the successive virtual pages residing in the four page frames with respect to the above page trace using the LRU replacement policy. Compute the hit ratio in the main memory. assume the PFs are initially empty.

(b) Repeat part (a) for the circular FIFO page replacement policy. Compute the hit ratio in the main memory

(c) Compare the hit ratio in parts (a) and (b) and comment on the effectiveness of using the circular FIFO policy to approximate the LRU policy with respect to dais particular page trace.

### If you were to select a person at random, what is the probability that they would have an IQ score of 130 or more, assuming the scores are distributed Normally

If you look at the scores on most IQ tests, they have a mean of 100 and a standard deviation of 15. For class discussion: (a) Why do you think….

### Dice are small cubes, held in the hand and then dropped or thrown on a flat surface, as part of a game.

Dice are small cubes, held in the hand and then dropped or thrown on a flat surface, as part of a game. Each surface of a die has a number….

### A web manager for a retail merchant tests two different presentations of a product to determine whether there is a difference in the length of time that people stay on that product page.

A web manager for a retail merchant tests two different presentations of a product to determine whether there is a difference in the length of time that people stay on….