Which data structure would best be used for storing a set of numbers and sorting them in ascending order? 

You need to access values using a key, and the keys must be sorted. Which collection type should you use? 

You need to access values in the opposite order in which they were added (last in, first out), and not randomly. Which collection type should you use? 

You need to access values in the order in which they were added (first in, first out), and not randomly.  Which collection type should you use? 

You need to access values in objects by a key that is not part of the object.  Which collection type should you use? 

You need to access values by an integer position.  Which collection type should you use? 

Using the merge method of the Map interface, which statement correctly updates the salesTotalByDept map of type Map<String,Integer> to update the sales total for a dept by an integer sales value?

Using the merge method of the Map interface, which statement correctly updates the wordCount map of type Map<String,Integer> to count all of the occurrences of a word in a file? 

You want to enumerate all of the keys in a map named myMap whose keys are type String. Which of the following statements will allow you to do this? 

Consider the following code snippet:

Map<String, Integer> scores;

You expect to retrieve elements randomly by key, and want fastest retrieval times.  Which of the following statements will create a structure to support this?