Is CMYK converted to lossless RGB?

Question

Design

CMYK is converted to lossless RGB why?

Answer 1

Depending on what CMYK, depending on what RGB.
If we mean the most popular sRGB space, then in the vast majority of cases the answer will be no.
For the reverse case, it is similar.
Plus, bitness and rounding errors can have some effect.

Answer 2

I don't know how appropriate it is to talk about losses when converting, firstly, to a different profile, and secondly, to a profile of a completely different color space. Colors can be infinitely close to identical, but only on the monitor. To compare this closeness to identity, you need to compare the Lab values.