online

Photography is a skill and competence to be learnt with utmost concern and with someone who is an excellent trainer of this domain. However, your requirement is for an online training or course, it means you already have the foundation made and wish to pursue further. I am sharing a photography course. Similarly, Video Editing Tutorials and MOOCs can be found. open2study.com offers a MOOC and like them, there are many other MOOCs to enhance skills.
What's it all about? You will learn about photography as a visual art practice, and how this can help you to become an engaging and active photographer. You will explore the work and concepts of contemporary photographic artists, which may trigger a new interest in what you photograph. In addition to this, you will also learn some of the practical skills required to further explore photography in exciting and creative ways. Finally, we look at the idea of a digital darkroom and explore ways that you can further your interest in photography through post-production knowledge and techniques. This MOOC is free and can be done in 28 days only. The course started on: 08/01/2018 and will be ending on: 06/02/2018.
You can enroll immediately.

Offline test is basically a pen and paper examination. You get a printed question paper and depending on the examination you are given answer sheets or OMR sheets to bubble in the answers.
In online test each person is given a computer in the examination hall (A computer lab). Questions are displayed on the screen and most often you have to select radio buttons beside the options given. Online test has great advantages as you can see the entire question palette with the all the details like questions you have answered, marked for review etc. You can either view one question at a time or the entire question paper. From my experience viewing 1 at a time gives us more patience to solve it.
And most often Online tests are usually in 'Air-Conditioned' halls.
I would suggest you to go through online mock tests.