QUESTION 11

Consider the following code snippet:

Stack stringStack = new Stack(); 

stringStack.push("ab"); 

stringStack.push("abc"); 

stringStack.push("a"); 

while (stringStack.size() > 0) 

{ 

 System.out.print(stringStack.pop() + ","); 

} 

What output will be produced when this code is executed?

		ab,abc,a,
		a,abc,ab,
		a,ab,abc,
		abc,ab,a,

QUESTION 12

A collection without an intrinsic order is called a ____.

		list
		stack
		set
		queue

QUESTION 13

The term ____ is used in computer science to describe an access pattern in which the elements are accessed in arbitrary order.

		sequential access
		random access
		sorted access
		arbitrary access

QUESTION 14

Consider the code snippet shown below. Assume that employeeNames is an instance of type LinkedList.

for (String name : employeeNames) 

{ 

 // Do something with name here 

} 

Which element(s) of employeeNames does this loop process?

		no elements
		all elements
		elements meeting a condition
		the most recently added elements

QUESTION 15

What type of access does a LinkedList provide for its elements?

		sequential
		semi-random
		random
		sorted

QUESTION 16

Complete the following code, which is intended to print out all key/value pairs in a map named myMap that contains String data for student IDs and names:

Map myMap = new HashMap(); 

. . . 

_______________________________ 

for (String aKey : mapKeySet) 

{ 

 String name = myMap.get(aKey); 

 System.out.println("ID: " + aKey + "->" + name); 

} 

		Map mapKeySet = myMap.keySet();
		Set mapKeySet = myMap.keySet();
		Set mapKeySet = myMap.getKeySet();
		Set mapKeySet = myMap.keySet();

QUESTION 17

Which method is NOT part of the ListIterator generic class?

		hasNext
		hasMore
		hasPrevious
		add

1 points

QUESTION 18

What can a generic class be parameterized for?

		properties
		iterators
		type
		methods

QUESTION 19

Consider the following code snippet:

LinkedList myLList = new LinkedList(); 

myLList.add("Mary"); 

myLList.add("John"); 

myLList.add("Sue"); 

ListIterator iterator = myLList.listIterator(); 

iterator.next(); 

iterator.next(); 

iterator.add("Robert"); 

iterator.previous(); 

iterator.previous(); 

iterator.remove(); 

System.out.println(myLList); 

What will be printed when this code is executed?

		[Mary, John, Robert, Sue]
		[Mary, John, Sue]
		[Mary, Robert, Sue]
		[John, Robert, Sue]

QUESTION 20

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?

		Map
		Hashtable
		Stack
		Queue