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while reading I found this:

Present/Absent bit – Present or absent bit says whether a particular page you are looking for is present or absent. In case if it is not present, that is called Page Fault. It is set to 0 if the corresponding page is not in memory.

and

Valid and Invalid bit are present in the page table of concern process and it indicate whether address generated by cpu is valid or invalid and tells whether the address generated belongs to process address space or not.

Also since the page table contains only the page entries for a process so how come V/I bit present in page table tell that the generated address is not valid for the addresses not present in process.

I am a beginner, so please help me build my concepts.

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