1. Is it possible to define a double pointer, like **p? What does this really mean? Can you think of a scenarios to use it? Are ***p or ****p meaningful/useful?

2. Let us say that ip is a pointer pointing to an item in an integer array of length 30. Which of the following expressions point to a valid item within the array: ip[-2] or ip[2]? Why?

3. Examine the following code fragment. What does the 2nd line do? Does it have any effect? Why? a. p = &x; b. *p = x;