In computer operating systems, demandpaging is a method of virtual memory management. It followsthat a process begins execution with none of its pages in physicalmemory, and many page faults will occur until most of a process'sworking set of pages are located in physical memory.

1. Describe the techniques in which the operating system can useto enhance the efficiency of demandpaging. (10marks)
2. How many page faults would occur if the working set policy wereused with a window size of 3 using FIFO and LRU Page replacementalgorithm. Consider the page reference string as your surname.

For example, let’s say your surnameas GANESH KUMAR then the page reference stringas G, A, N, E, S, H, K, U, M, A,R (10 marks)