What is memory mapped files and how in use?

Related questions

1. What is the purpose of MMAP?
2. Is virtual memory faster than RAM?
3. What is Caddr_t?
4. What does it mean to map a file?
5. What does memory mapped mean?
6. What do you mean by anonymous mapping?
7. How is mapping done in virtual memory?
8. Does MMAP allocate memory?
9. How does MMAP work in Linux?
10. What do you mean by mapping files into memory in Linux?

Tags

1. #enables
2. #between
3. #contents
4. #including
5. #processes
6. #writing
7. #directly
8. #modify
9. #reading
10. #multiple
11. #mapped
12. #virtual
13. #contains
14. #mapping
15. #space
16. #memory
17. #application