Operating Systems

PROCESS 'A' HAD BEEN EXECUTING (LAST ACCESS WAS IN PAGE FRAME 003). IT HAS 3 PAGES IN MEMORY AND HAS HAD A PAGE FAULT. THE O/S MUST DETERMINE WHICH PAGE TO REPLACE FOR 'A'S NEW PAGE. USING THE INFORMATION PROVIDED ANSWER THE QUESTION BELOW. (NOTE: THESE ARE ALL THE PAGE FRAMES AND CLOCK POLICY FOLLOWS FRAME #S) (NOTE: CURRENT TIME 15:02)

WHAT PAGE FRAME# (1 through 6) WOULD BE REPLACED IF WE WERE USING:

A) LFU REPLACEMENT STRATEGY: __

B) LRU REPLACEMENT STRATEGY: __

C) FIFO REPLACEMENT STRATEGY: __

D) CLOCK POLICY REPLACEMENT STRATEGY: __

E) WORKING SET REPLACEMENT STRATEGY: __

PAGE ENTERED LAST FRAME 001 002 003 004 005 006 PROCESSES IN MEMORY TDME 'A' 10:15 04:12 A. I 12:10 10:22 01:05 13:00 LAST USE USE COUNT POLICY 12:14 120 04:13 52 15:01 100 1 NEXT PTR 10:30 050 13:30 200 14:40 175