Primary keys must be numbers that already represent something (like a telephone number.)

Exception handling is the process of ensuring that the flow of the program doesn't break when an error occurs.

a. true b. false

When an insertion is done using the probing technique:

A. if the element to be inserted hashes to an occupied position, a sequential search is performed until an empty position is found B. if the element to be inserted does not hash to an occupied position, another hash function is used C. if the element to be inserted hashes to an occupied position, the element is inserted into a linked list D. a sequential search is done from the beginning of the table until an empty position is found