online

To prepare for CPT Exam preparation, there are many apps available on play store.
For your preparation, you can easily access these apps & find it very useful. I would like to name some of the few Apps are:
Prepguru
CPT Quick ref
Konceptca
Online tayari etc
By logging in to such apps, you can study & learn so many questions in just one click. You just easily crack the exam after getting through these mock tests & practice paper.
However, you should not completely rely on online preparation. The approach used in teaching could be different from what is actually required. Online is also a better option for mock test and papers rather than the actual prep. So, focus on preparing through books or coaching and practice online.

The best coaching to go for SNAP is Test Funda.
They are not really enough until you study on your own.
1. Read a newspaper online every day. It can be done in your extra time. It could be The Hindu or Firstpost. You can also read selective articles from any Time or Washington Post. Also, start Word Power Made Easy by Norman Lewis.
2. Start viewing lectures online. The website of EduSaathi can help you in that. Watch videos of all topics sequentially and solve questions. This will help you to get your basics correct.
Continue the above two steps for 2 months. For self-study, you can also go for the following books,
For Quant, you can go for either Arun Sharma or Nishith Sinha or Quantum CAT by Sarvesh Verma.
For LRDI, you can go for Arun Sharma or Nishith Sinha.
For Verbal Ability, you can look for Arun Sharma & Meenakshi Upadhaya.

Hi,
As you have done B.Tech and is much more experienced as you have worked in the service sector, sales & service engineer and sales manager, so it will be quite easy for you to understand the online course.
Some online courses for sales are:
1. Online Sales and Marketing Management Courses of Credit-Study.com's. These courses offer an affordable and effectual path to college credit. They offer in-depth training through the engaging video lessons taught by marketing and sales professionals.
2. Free Online Non-Credited Sales and Marketing Management Courses-These free online courses don't require students to enrol or register, but they also don't typically award any college credit. Students may need to obtain special software, such as document readers or media players, in order to access course materials.
3. Kutztown University of Pennsylvania-Identifying Your Sales strategy which includes discussions on client needs, product/service differentiation, targeting and sales talent acquisition. A slide presentation with audio guides the student through sales forecasting, budgeting and presentation skills.
4. The Open University-It also provides online courses on Marketing Communications as a Strategic Function. The Market-Led Organisation and Social Marketing.
5. Sales Strategies: Mastering the Selling Process-This is a sales course created by University of Chicago.
It is very helpful for the students seeking online classes.
Hence, you go through all these and choose the online course you want to opt for.
All the best for your future.
Thank you.