Multiple choice technology operating systems

Which UNIX command is used to write in-core super block and inode table information to the disk?

  1. write

  2. sync

  3. insync

  4. write_core
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sync command forces all in-core file system data structures, including super blocks and inode tables, to be written to disk. This ensures data integrity after system crashes or power failures. The 'write' command writes to files, not kernel buffers.

AI explanation

To answer this question, you need to understand the purpose of the different UNIX commands related to writing data to disk.

Option A) write - This option is incorrect because the "write" command is used to send messages to other users or terminals, not to write data to the disk.

Option B) sync - This option is correct because the "sync" command is used to flush file system buffers and write in-core super block and inode table information to the disk. It ensures that all pending disk writes are completed and that the file system is synchronized.

Option C) insync - This option is incorrect because there is no "insync" command in UNIX. It is not a valid command.

Option D) write_core - This option is incorrect because there is no "write_core" command in UNIX. It is not a valid command.

The correct answer is B) sync. This option is correct because the "sync" command is used to write in-core super block and inode table information to the disk, ensuring that all pending disk writes are completed and that the file system is synchronized.

Keep practicing — related questions