A DVD is relatively portable but I suspect you mean a DVD player? In which case it's only portable if it's a portable DVD player.
False, They can use optical storage discs.
Optical Discs
no
Portable means easy to carry round, Optical means uses light to make it work. So optical media could be portable.
An optical drive is an input and output device. It reads data from optical discs like CDs and DVDs (input) and writes data to these discs (output).
Yes
Yes
A optical drive is essentially what you put CD's DVD's and install discs into.
Optical discs are generally more reliable than floppy discs due to their resistance to environmental factors such as dust, moisture, and magnetic interference. Unlike floppy discs, which can degrade over time and are susceptible to physical damage, optical discs are designed for longevity and can store data safely for decades if kept properly. Additionally, the data on optical discs is encoded in a way that allows for error correction, further enhancing their reliability.
cd, dvd, and vcd
Optical recording equipment is used to digitally store and retrieve data on optical discs such as CDs, DVDs, and Blu-ray discs. These discs use a laser to read and write data on a reflective surface, allowing for high-capacity storage of music, videos, software, and other digital content.
During the 1990's.