Multiple choice technology

A dual-layer DVD is valued because it:

  1. Can hold more data

  2. Contains a backup of the data stored

  3. Uses a second layer to offer a speed increase

  4. Creates alternative sound tracks
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A Correct answer
Explanation

A dual-layer DVD (also called DVD-9) has two data layers on one side of the disc that can be read by the same laser. This effectively doubles the storage capacity from 4.7 GB (single layer) to approximately 8.5 GB, allowing for longer movies, additional content, or higher quality video on a single disc. The second layer does not provide speed increase, backup functionality, or alternative audio tracks - its primary value is increased storage capacity.

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