12. File System Implementation - Operating System

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Practice MCQs for 12. File System Implementation. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-27

Easy Questions

167

Medium Questions

109

Hard Questions

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📝 Sample Questions

Q1. A computer system needs to update a configuration file stored on disk. Which method most efficiently uses the disk’s ability to rewrite a block in place?

🔹 A. Read the entire disk, modify, and rewrite the whole disk

🔹 B. Locate the specific block, modify its contents, and write back the same block

🔹 C. Delete the file and recreate it from scratch

🔹 D. Copy the file to another disk, edit, then replace the original

💡 Difficulty: easy | ✅ Correct: B

Q2. A developer must copy a large file from one directory to another on the same disk. Which strategy best reduces I/O overhead?

🔹 A. Read each block, write it to the new location, then delete the original blocks

🔹 B. Update the file‑system metadata to point to the existing blocks in the new directory entry

🔹 C. Create a temporary file on a different disk, copy data, then move it back

🔹 D. Read the file sequentially, compress it, then write the compressed version

💡 Difficulty: medium | ✅ Correct: D

Q3. A program needs to store a 1500‑byte record. Which block size minimizes wasted space while still fitting the record in a single block?

🔹 A. 512 bytes

🔹 B. 1024 bytes

🔹 C. 2048 bytes

🔹 D. 4096 bytes

💡 Difficulty: hard | ✅ Correct: C

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