Question

Consider the following page reference string :

1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6
vi) For Optimal page replacement algorithms with 5 frames, the number of page faults is :
a) 6
b) 7
c) 10
d) 9

Answer 1

The number of page faults using the Optimal algorithm with 5 frames is 9.

Step-by-step explanation:

The Optimal page replacement algorithm is a algorithm used in computer science for page replacement in a virtual memory operating system. It selects the page that will need to be used at the latest time in the future, ensuring the optimal use of memory and minimizing page faults.

In the given page reference string and with 5 frames, to calculate the number of page faults using the Optimal algorithm, we simulate the algorithm by looking ahead in the reference string and replacing the page that will not be used for the longest time.

Considering the given reference string, the number of page faults with 5 frames using the Optimal algorithm is 9 (option d).