The Clock policy is used as a page replacement algorithm. The simplest form requires an additional bit with each frame, as the use bit. When a page is first loaded into a frame in memory, the use bit is set to 1. Whenever the page is subsequently referenced, its use bit is set to 1. When a page is placed, the pointer is set to the next frame after the one just updated. When to replace a page, the operating system scans the buffer to find a frame with use bit 0. Each time it encounters a frame with use bit 1, it reset that bit to 0 and continues. Consider the following string of page references: A, B, C, B, D, E, F, D, A, C, F, B, D. The main memory can contain FOUR frames. Show the detailed frame allocation using the Clock policy.
Make sure you mark the use bit, the pointer, and page faults clearly.