Multiple choice technology operating systems

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

  1. 464

  2. 644

  3. 646

  4. 462
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The symbolic mode o+rw adds read (4) and write (2) permissions for others, so others get 4+2=6. Keeping default user (rw=6) and group (r=4) permissions unchanged gives 646. Option A (464) gives user read-only, Option B (644) gives others read-only, and Option D (462) gives group write permission incorrectly.

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