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Problem 1 (UNIX Access Control Lists): It is said that UNIX uses access control lists. Does the UNIX model include capabilities as well as access

Problem 1 (UNIX Access Control Lists): It is said that UNIX uses access control lists. Does the UNIX model include capabilities as well as access control lists? (Hint: Consider file descriptors. If a file is opened, and its protection mode is changed to exclude access by the opener, can the process still access the file using the file descriptor

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