Q1) Suppose that we want to have a quiz where the question could be to name the president as well as capital city. How can we do this with multidimensional arrays?

Q2) In our Persistence example section, we saved a continually updating string to a file so that it persisted after the app had been shut down and restarted. This is like asking the user to click on a Save button. Summoning all your knowledge of Chapter 2, Getting Started with Android, can you think of a way to save the string without saving it in the button click but just when the user quits the app?

Q3) Other than increasing the difficulty level, how could we increase the challenge of our memory game for our players?

Q4) Using the plain Android UI with the dull grey buttons isn't very exciting. Take a look at the UI elements in the visual designer and try and work out how we could quickly improve the visual appearance of our UI.