The UNIX sytem uses a/an ________, stored at the beginning of a some files to indicate roughly the type of file.
A. identifier
B. extension
C. virtual number
D. magic number
Answer:A
The UNIX sytem uses a/an ________, stored at the beginning of a some files to indicate roughly the type of file.
A. identifier B. extension C. virtual number D. magic number
Explanation: None.