How to use this self-assessment
Type your answer in the relevant box. Press the tab key. If you are correct,
a pop-up alert box will tell you so. If the pop-up alert box does not appear, then
you must try again and repeat the process. When you have the correct answer,
clear the typing from the box and then press the tab key.
Please note that it is important to clear the typing from the box before pressing
the tab key; otherwise, you will keep repeating the pop-up alert box.