Which service (platform) for corporate training / testing / knowledge base is better to choose?

Question

Distance learning

Help to choose a corporate platform for training.
Required functionality:

• knowledge base
  
• training courses with the ability to add multimedia
  
• questions about courses, confirmation of competencies, opening the next course only after passing the test
  
• employee testing
  
• the service, if possible, should be adapted for mobile devices or have a mobile application
  
• service without code, for ordinary users
  

And another question, what kind of service in the photo?

Thank you all in advance!

Answer 1

First of all:
moodle.org/
and its analogues:
startpack.ru/application/moodle/alternatives