The Daily Scrum was meant for Developers to give each other an idea of the work they had done the day before and their plans for the day in progress. It was never meant for Product Managers or Product Owners to be part of them unless they are taking part of the work in the actual product by working on Sprint Backlog Items.
Even though, the test is your knowledge is about being a Product Owner using the Scrum guide, in reality, the Scrum guide is not enough for you to pass it. Therefore, you are required to find other sources that might help you complement your knowledge for being a good Product Owner using the Scrum framework.
The roadmap informs all stakeholders of the status of the product and what they should expect in the next months in terms of releases. Of course, this is a living document, and feedback from the users or reacting to the market might change the product roadmap.