When selecting a complex shape with the Lasso tool, you will usually find it easier to make small selections then add to them with the ____ key.

Which of the following dictionary operations has efficiency O(n) no matter what implementation if the ADT dictionary is chosen?

a. retrieval b. traversal c. removal d. addition

Which of the following statements is false?

a. References to interface types do not have access to method toString. b. Method toString can be invoked implicitly on any object. c. With inheritance, classes and their inherited classes tend to be very similar. d. Dramatically different classes can often meaningfully implement the same interface.