OPERATING SYSTEM-UNIT-4

• VIRTUAL MEMORY
• DEMAND PAGING
• PAGE REPLACEMENT
• FIFO PAGE REPLACEMENT
• OPTIMAL PAGE REPLACEMENT
• LRU PAGE REPLACEMENT
• LRU APPROXIMATION PAGE REPLACEMENT    

                       ADDITIONAL REFERENCE BITS ALGORITHM

                       SECOND CHANCE ALGORITHM

• COUNTING BASED PAGE REPLACEMENT

                         LFU PAGE REPLACEMENT ALGORITHM
                         MFU PAGE REPLACEMENT ALGORITHM

• PAGE BUFFERING ALGORITHM
• THRASHING