1.whawhat are the challenges faced in your project? 2.what is difference between active & inactive relationship & explain detailed with 1 example? 3.what is star schama & snow flake schema & give example? 4.how many joins in power bi & what are they? 5.what is cross join? 6.what is append query?& Merge query? Give me a example? 7.why required reports & dashboard?8.how to remove duplicate in power bi?