While i was preparing for the S/4HANA Sourcing and Procurement certification exam, i realized that i was missing something in the format. Gradually i realized that i did not know the practical application of the same in spite of knowing the syllabus and concepts. My concepts became clear only when i started practicing online on the mock tests. Through that i came to know that Purchasing Optimization topic has 8% to 12% weightage and topic Sources of Supply also has 8 to 12% weightage. And that is how my practice helped me master the topics smartly.