Few weeks ago I took a course for the Professional Scrum Master I (PSM I) in Zürich. It was a very good course which gives you some useful tips and a fundamental understating for the role as scrum master.

After the two day course you can take the online assessment to receive the PSM I certificate. You can also take the online assessment without the two day course but I would not recommend it, because you changes to succeed will not as good when you take the course.

This was not my first assessment in English for a certificate, but honestly I was not so easy as I tough to pass.

For someone which English is a foreign language there are some tough and complex questions.

When you take the course, read and and understand the scrum guide, have some experience with scrum and prepare yourself with the open assessment then you have a good change to pass the exam.