Hi @Tarek_Hammami,
Welcome to the MongoDB Communion forums 
MongoDB has instituted a regular review cadence for the training and certification content.
Product changes that impact the training and certification content are implemented in real-time, eliminating the need to associate the content with a particular release.
I hope it answers your questions. If you have any follow-up questions feel free to reach out to us!
Regards,
Kushagra