Solution

The correct answer is A - II, B - IV, C - I, D - III

Key Points

To match RAID levels from List-I with their correct characteristics from List-II, let's examine each RAID level:

• A. RAID level-2
  • RAID 2 uses error-correcting codes (ECC) to provide fault tolerance, specifically Hamming codes.
  • Correct match: II. error-correcting-code
• B. RAID level-3
  • RAID 3 uses a dedicated parity disk and is bit-interleaved.
  • Correct match: IV. bit-interleaved
• C. RAID level-4
  • RAID 4 uses a dedicated parity disk but is block-interleaved, meaning data is striped across disks in blocks.
  • Correct match: I. block-interleaved
• D. RAID level-6
  • RAID 6 uses Reed-Solomon codes for fault tolerance, allowing for the failure of two disks.
  • Correct match: III. reed-solomon codes

Therefore, the correct answer is: A - II, B - IV, C - I, D - III