This article provides you a very general information about UML. To understand more detail about UML, you should follow other articles or read a full book.

I have found that many BAs cringe when talking about software testing. They don't want to test and don't seem to want to learn the basic testing principles. I fell in love with testing when I learned about the best practices and all of the techniques. When you are testing, your goal is to find problems. What other job encourages you to look for and point out problems?? The more problems you find the more successful you are! And of course, the ultimate goal of all quality assurance is to improve the quality of our solutions!