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Floating-point numbers contain a fractional part and can be represented by the          data type.

a) frac b) real c) double d) None of the above.

Answer the following statements true (T) or false (F)

1) Left and right rotations can be used to rebalance an unbalanced binary search tree. 2) An AVL tree is often implemented so that a node contains a reference to its parent node. 3) An ordered set of elements can be maintained using a linked list or a binary search tree. It is generally faster to locate an element in a binary search tree than it is to locate an element in a linked list. 4) A Red/Black tree is often implemented so that a node contains a reference to its parent node. 5) The most efficient binary search trees are balanced.