Jawaban:

To solve this problem, we need to simulate the operation of the page replacement algorithm using the given page reference sequence. We can do this by using a data structure to keep track of the pages that are currently in memory. In this case, we will use a queue, since the page replacement algorithm uses FIFO (first-in, first-out) page placement.

First, let's initialize some variables to keep track of the number of page references, page hits, and page faults:

page_references = 0

page_hits = 0

page_faults = 0

Next, we will initialize the queue with 3 empty pages:

queue = ["", "", ""]

Now we can start iterating through the page reference sequence, one page at a time. For each page reference, we will check if the page is already in memory by searching the queue. If the page is found, we increment the page hit count. If the page is not found, we increment the page fault count and add the page to the queue.

Here is the code to do this:

for page in [1, 2, 3, 4, 3, 2, 0, 4, 3, 1, 0, 4, 0, 1, 2, 1]:

   page_references += 1

   if page in queue:

       page_hits += 1

   else:

       page_faults += 1

       queue.pop(0)

       queue.append(page)

After executing this code, the variables page_references, page_hits, and page_faults will contain the number of page references, page hits, and page faults, respectively.

To calculate the hit ratio and fault ratio, we can simply divide the number of page hits and page faults by the number of page references:

hit_ratio = page_hits / page_references

fault_ratio = page_faults / page_references