Pick one and press Start, then click Next › to step through it.
Watch for
The disk-to-RAM load on the first read, then no disk activity at all on the second.
More about this scenario
You'll learn
Why the second access to a file is so much faster than the first — a hit skips the disk entirely.
How it runs
The first read finds no resident frame, so the kernel reads the 4 KB page off disk into a free frame. The repeat read finds that frame and copies from memory.