If a file grants read and write permissions exclusively to its owner, what is the corresponding octal representation_________________?
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Answer: B. 6
Explanation
Octal permission numbers add up individual bits representing read, write, and execute permissions. The value four represents read permission while the value two represents write permission explicitly. Summing four and two yields six, granting the owner both read and write access. Unix file permissions use three octal digits to represent owner, group, and others access. Each digit ranges from zero to seven based on combinations of read, write, and execute. Zero means no permissions are granted, completely restricting access for that specific user category.
Secure file management requires setting correct permissions to prevent unauthorized access to sensitive documents. System administrators calculate octal values quickly when configuring security policies for newly created files. Understanding permission math prevents accidental exposure of private configuration files on multi-user systems. Option A represents only execute permission, which fails to provide the required read capability. Option C represents read and execute permissions, which lacks the necessary file writing capability. Option D represents write and execute permissions, leaving out the essential file reading capability.
- Subject
- Computer Science
- Category
- Software Engineering
- Topic
- —
- Difficulty
- medium
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