1. What is a variable?
2. What is a string literal?
3. What is a string variable?
4. What is a numeric variable?
5. Why are there many different types of numeric veriables?
6. What is a variable declaration?
7. What is variable initialization?
8. What is special about the main method?
9. What are expressions?
10. What is type casting and why is it useful?
11. What is a class?
12. What is an object?