The command chmod 754 FILE1.EMP sets the permission to file FILE1.EMP so that

Question

BlackTom AI · Accepted Answer

To analyze what chmod 754 FILE1.EMP does, recall that the three octal digits specify permissions for owner, group, and others respectively.

Option 1: 'no one can access it except the owner' This would correspond to something like 700 or a situation where others and group have no permissions. However, with 754, the owner has full permissions (7), so others or group are not completely blocked. Therefore this statement is incorrect.

Option 2: 'all the users can execute it' Executing (x) is granted to the owner (7 includes execute), and to the group (5 includes execute is not included; 5 is read + execute, wait—5 actually is read and execute? No: in octal, 5 equals read (4) + execute (1) = 5. But for others we have 4 which is read only. Here the group has 5, meaning group can read and execute. The phrase 'all the users can execute it' would require execute permission for everyone, which is not the case because others have only read (4) and the owner has execute as part of 7. Since not all users can execute, this statement is incorrect.

Option 3: 'all users can read it' The others have permission 4 (read) and the group has 5 (read + execute), while the owner has 7 (read, write, execute). In particular, every category includes read access (owner, group, and others all have at least read). Hence, all users can read the file, making this statement correct.

Option 4: 'nobody can delete it' Deletion rights are governed more by directory permissions than by file permissions, and there is no delete bit in the standard file-mode bits. The statement is not accurate in describing what chmod 754 does for FILE1.EMP, so it is incorrect.

In summary, only the statement that 'all users can read it' accurately reflects the permissions granted by 754 for a file. The other options describe access scenarios that do not align with the owner/group/other permissions set by 754.

The command chmod 754 FILE1.EMP sets the permission to file FILE1.EMP so that

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