QUESTION 1 The ArrayList class implements the ____. Queue interface. Set interfa

Question

QUESTION 1

The ArrayList class implements the ____.

Queue interface.

Set interface.

List interface.

Stack interface.

QUESTION 2

Assume that you have declared a map named myMap to hold String elements with Integer keys. Which of the following statements will correctly remove an element from myMap?

myMap.get(3);

myMap.remove(3);

myMap.pop(3);

myMap.delete(3);

QUESTION 3

Which of the following statements about manipulating objects in a map is NOT correct?

Use the add method to add a new element to the map.

Use the get method to retrieve a value from the map.

Use the keyset method to get the set of keys for the map.

Use the remove method to remove a value from the map.

QUESTION 4

You use a(n) ____ to access elements inside a linked list.

accessor

index

list iterator

queue

  

QUESTION 5

We might choose to use a linked list over an array list when we will not require frequent ____.

I random access

II inserting new elements

III removing of elements

I

II

III

II and III

QUESTION 6

You need to write a program to build and maintain an address book. Since the program must support the possibility of having duplicate names, which data structure would be most appropriate to model this situation?

map

stack

queue

linked list

QUESTION 7

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

Map

Hashtable

ArrayList

Queue

QUESTION 8

A collection without an intrinsic order is called a ____.

list

stack

set

queue

QUESTION 9

A stack is a collection that ____.

remembers the order of elements, and allows elements to be added and removed only at one end.

does not remember the order of elements but allows elements to be added in any position.

remembers the order of elements and allows elements to be inserted in any position.

remembers the order of elements and allows elements to be inserted only at one end and removed only at the other end.

Queue interface.

Set interface.

List interface.

Stack interface.

Explanation / Answer

1) List Interface

2) myMap.pop(3);

3) answer is a because we use put to add a new element to the map.

8) A collection without an intrinsic order is called a ____. set

9)

A stack is a collection that ____.

remembers the order of elements, and allows elements to be added and removed only at one end.

remembers the order of elements, and allows elements to be added and removed only at one end.

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