What is usually studied in 1s?

Question

1C

I looked at the content of books on 1s (I didn’t read it because little is remembered without practice) the sections are the same everywhere,
but recently having looked at what is needed to get a certificate, I found out that they are different and it’s unclear what to relate to what I want to do. I want to refine 1C configurations for companies, which I think most certified specialists do,
but which exam 1C: 1C: Enterprise 8 Platform Specialist or 1C: 1C: Enterprise 8 Application Solutions Specialist do I need to prepare for?
and whether I searched for books in suitable
books: Kashaev S. M. 1C-Enterprise 8.1. Learning to Program with Examples (3rd Edition, 2010)
M.G. Radchenko 1C Enterprise 8.2 Practical Developer's Guide
Programming in 1C Enterprise 8.3

Answer 1

You can apply for a specialist only after receiving a 1C Professional certificate in the required direction. To prepare, buy collections of problems for the required exam and solve them. Be sure to check the conditions for passing the exams. There can be a lot of nuances to a Specialist.

Answer 2

I started to study 1C according to M. G. Radchenko "1C Enterprise 8.2 Practical Developer's Guide", in the process of robots I have already read a lot of things.
I have been successfully working in the field of 1C for 3 years, and only now I am thinking about getting certificates, and then only because at work they pay extra for having certificates of the "specialist" level.