This is what the Application looks like in Test mode, please see the Study Mode Details for a more in depth explanation on everything. I'm just going to describe what is different here compared to the Study screen.
Reveal Button (Down thumb pad button) - The button with a magnifying glass will reveal the English meaning of the word.
X Button (Up thumb pad button) - This button will change to a green Checkmark to indicate that you got this word right. I use this so I can keep track of how well I'm doing. It is completely user controlled, though. It has no way of you guessing what the English meaning is before you Reveal it. I may add some kind of multiple choice thing in the future. For now this suits my purposes.