1.  What is indirection?

2.  How many levels of pointers can you have?

3.  What is a null pointer?

4.  When is a null pointer used?

5.  What is a void pointer?

6.  When is a void pointer used?

7.  Can you subtract pointers from each other? Why would you?

8.  Is NULL always defined as 0(zero)?

9.  Is NULL always equal to 0(zero)?

10.  What does it mean when a pointer is used in an if statement?