Page fault trap occurs if the requested page is not into memory. The page fault primarily causes an exception, which is used to notify the operating system to retrieve the "pages" from virtual memory to continue operation. Once all of the data has been placed into physical memory, the program resumes normal operation. The Page fault process occurs in the background, and thus the user is unaware of it.
Page Fault Terminology 1)Page Hit 2) Page Miss 3) Page Fault Time 4) Page Fault Delay 5) Minor Page Fault Etc
Minor Page Fault-If a process needs data and that data exists in memory but is being allotted to another process at the same moment, it is referred to as a minor page fault.