Questions

1. What is wrong with this method definition?

   doSomething(){
      // Do something here
   }

   No return type is declared. You do not have to return a value from a method, but its return type must be void in this case. This is how the method should look:

   void doSomething(){
      // Do something here
   }

2. What is wrong with this method definition?

   float getBalance(){
      String customerName = "Linus Torvalds";
      float balance = 429.66f;
      return userName;
   }

   The method returns a string (userName) but the signature states that it must return a float type. With a method name like getBalance, this code is what was likely intended:

   float getBalance(){
      String customerName = "Linus Torvalds";
      float balance = 429.66f;
      return balance;
   }

3. When do we call the onCreate method? (Trick question alert!)

   We don't. Android decides when to call the...