Question

CD is a temporary memory​

Answer 1

CD is called compact disk it is called output storage device.

Answer 2

Floppies are magnetic storage (like tape). They will be tempory until the magnetic field weakens (corrupting the data).

re-writing the data will restore the magnetic field.

Generally a magnetic field can last 5–10 years or more (given optimal storage conditions).

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CDs are either of 2 things:

permanent (stamped in a press like music cds)

tempory (cd-r /rw) write to once or re-write, unfortunately these mediums are both tempory, with around double the life of floppy (10+ years).

Some ‘premium’ write once cd-r are rated at 100 years … but as that still isnt ‘forever’, it can be taken as non-permanent. Though I would probably class 100years as a semi-permanent state.

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rule of thumb: anything you write will be tempory.

What is CD-R shelf life? - Definition from WhatIs.com