You may read Google's support documentation about quizzing here.
Setting up a quiz is really easy, especially if you are familiar with Google Forms. There is a separate settings section for quizzes that may be accessed by clicking the gear icon from within a form. You may choose when students see their grade (immediately or after a review), and what information they will see (missed questions, correct answers, and point totals). Because this is a Google Form you have the option to allow the submitter to either edit their response or submit another form. Both option could be used to create a study aid/self test. There are three types of questions that can automatically be graded in Forms. They are: multiple choice, check-boxes and drop-downs. Each give you the option of selecting the correct answer(s) and then entering feedback for both correct and incorrect answers.
There are some exciting tools coming from Google for teachers and students. You can read more about that here.