Multiple choice technology operating systems

what is the octal notation for the symbolic expression o+rw?

  1. 646

  2. 464

  3. 644

  4. 462
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Explanation

The symbolic expression o+rw adds read (4) and write (2) permissions to others. Assuming standard base permissions of 644 (rw-r--r--), adding rw to others (o) results in 646 (rw-r--rw-). Thus, 646 represents the new octal permission state.

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