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Dr. John R. Hubbard holds a Ph.D. in Mathematics from the University of Michigan and a M.S. in Computer Sciences from Penn State. He is a Professor Emeritus at the University of Richmond.
Linked Data Structures -------------------------------------- 1. The actual value of the reference is the memory address of the object to which it refers. In other programming languages, such variables are called pointers. 2. The value null means that the variable does not refer to any object. 3. Each node object is shown as a big with two parts: the left side contains the integer data, and the right side contains the next reference.