What are the advantages of Optical discs (CDs and DVDs)?

• A. Very cheap and resistant to water and shocks.
• B. High capacity.
• C. Fast read/write speeds.
• D. They have no physical media.

Answer: (C)

Optical discs are valued mainly for cost-effective, reliable storage that’s easy to distribute and preserve offline. They’re inexpensive to manufacture in bulk, offering a low cost per gigabyte, which makes them great for archiving and distributing large sets of data. They also have a long shelf life when kept in proper conditions, since the data is stored as physical marks and doesn’t rely on powered electronics to remain intact. Their broad compatibility across many older and newer devices, plus the fact you don’t need any special hardware to keep the data once it’s written, adds to their practicality for long-term storage and distribution.

However, fast read/write speeds aren’t a real strength of optical media; their transfer rates and random access times are generally slower than hard drives and flash storage. The other options either misstate the nature of the media or exaggerate capabilities that aren’t inherent advantages of CDs and DVDs. So, the practical takeaway is that the advantages lie in low cost, portability, broad compatibility, and archival stability rather than speed.