I passed here are my resources
Like it is said, Scrum is easy to learn but subtile to exert.
You need to internalise the concepts so you can apply them and come back with your own solutions when facing every day goals.
I got it on the first shot, it was not easy, not because of the content of the questions but because sometimes I need to handle my stress.
Even with stress having working with great resources I was able to concentre and look for the right answer or even rely on automatisms.
So here are my resources :
- The Scrum Guide. I've been working with it every day and I'm still reading it to find some gems and details. To help me going further I draw a lot of schema, I draw and redraw until I can explain it clearly to myself or follow a flux of event. Visual stuff can help you because Scrum is all about the right flow and throughput.
- Scrum Open Assessments is the test you should train every day for the first week you start training
- Then move with Mikhail Lapshin http://mlapshin.com/index.php/scrum-quizzes/pspo-learning-mode I loved this one
- My books are Scrum the Art of ... from Jeff Sutherland and Scrum Narrative and PSM Exam Guide this one really help to extend my concepts.
There's a lot of suggestions of books, blogs, resources but try to be agile when learning agile. Start with basics and reliable but also cheap resources. If you have a budget and want to be serious you can close the round with MPlaza materials.
Be confident, if you can explain Scrum to a five years old child (ELI5) then you can pass the test.
Best of luck.