The learning objectives test covers questions on each learning unit of the chapter “Architecture of serial bus systems”. At the end of the learning objectives test, you can have your answers checked. It is not necessary to answer all of the test questions. You can have the correct answer shown by clicking the key icon. The next time you call the learning objectives test, you can have your answers checked again.If you experience difficulties answering the questions of the learning objectives test, simply review the relevant learning unit.