What key can be pressed to constrain a shape?

If you want a class that implements the List interface and do not need any methods beyond those in the List interface, you can use the ____________ class.

a. Vector b. LinkedList c. HashSet d. TreeSet

A connected graph has which of the following properties?

a) For any pair of vertices, there is an edge between them. b) Every vertex is adjacent to every other vertex. c) No vertex is adjacent to every other vertex. d) For any pair of vertices, there is a path between them. e) There exists a vertex that is adjacent to every other vertex.