Multiple choice

Which of the following is the least expensive backup medium?

  1. CD-ROM

  2. DVD-RAM

  3. RAID drive

  4. Magnetic tape
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Magnetic tape offers the lowest cost per gigabyte for backup storage, making it economical for archiving large datasets. While optical media have low per-disc costs, their limited capacity (700MB for CD, 4.7GB for DVD) makes them more expensive per GB for substantial backups. RAID systems provide fast access but significantly higher cost per unit of storage.

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