Perhaps the most apparent Pietist trait is a de-emphasis on doctrine and an emphasis on the personal pursuit of piety, a changed life, etc.
Question #3 is a prime example of pietist beliefs, "The Bible is unclear on many points of doctrine, so diversity is acceptable."
Liberalism is the logical end result of Pietism, especially when mixed with other ideas, such as rationalism. One of the defining beliefs is Question #7, "Since the Law is doctrine, and doctrine is not always clear, moral relativism is acceptable." Which is the perfectly logical end result of Question #3.
Fundamentalism is a Pietist reaction against Liberalism. It retains all the same traits as Liberalism, but adds in Question #5 "There are a core group of beliefs that are required in order to be saved." Therefore, allowing them to reject Question #7.
So, whenever there is a new thread entitled, "What are the essentials?" or similiar, you can immediately tell that the person is a Pietist, as it is a thoroughly Pietist process of theological thought.
Also, it may be added, Liberals often tell Fundamentalists that they have only been around for a little over a 100 years, while Fundamentalists retort that Christians have always believed things such as homosexuality being a sin, and it is the Liberals that are new. In a way, both are correct. Fundamentalism is new, and the moral issues contested by Liberals have always been held to be true. Fundamentalism is really just a way of freezing Pietism in the past.
Moderate is something that I arbitrarily put in, as some people do not fit into the polar ends. They may reject rationalism, unconsciously hold to certian "fundamentals," or just be what Liberal pietists were 100 years ago.