I just started preparing for my microsoft 70 480 scheduled next month. Today I read about jQuery Selectors. I also came to know that CSS selectors and jQuery selectors more over same. I created a web page for the same. You can click on a selector and it will tell you what the selector does and give you a demo on screen. Simply click a button and look for the changes it brings. Hove over a button and get to know what it does. It covers all the selectors available to us including first, last, first-child, last-child, nth-child, hidden, visible, input elements, child, siblings, parent, use of + ^ $ | , ~ and many more. Let me know about your findings.
Hope you find it useful for your preparation.