I have a sequence like 5577334... and there are 3 frames available.
After the 6th clock, all pages (5, 7 and 3) will have their reference bits set to 1. Now, when 4 comes in, 5 will go even though its reference bit is 1 because of the FIFO rule but what happens 7 and 3' referance bits? Do they stay as 1? or Is 7's reference bit set to 0 since there is FIFO rule? or Are both 7 and 3' referance bits set to 0?