Concepts in the syllabus are clear now

I was weak in the topics Understand how the ITIL guiding principles can help an organization adopt and adapt service management and Understand the purpose and components of the ITIL service value system that were mentioned in the syllabus of the ITIL 4 Foundation certification exam. I wanted to learn more about them. My mentor suggested that attempting questions based on these topics will help me and hence i subscribed for the ITIL 4 Foundation online mocks with unlimited access. The reason i went for the premium membership is that the cost of the membership is not much yet the benefits i attained were more than that.