Question 1

Create a for loop to initially set the values of the vector created in number 1 above to the value of negative 1.0.

Accepted Answer

forint i=0

Question 2

What is the purpose of the Java Iterator interface?

Accepted Answer

The Iterator interface provide

Question 3

What is the difference between a vector's size and a vector's capacity?

Accepted Answer

A vector's size refers to the

Question 4

All of the following methods are part of the Collection interface except:

Accepted Answer

A) Contains) 
B) toArray) 
C) retainAll) 
D) toString) 
A) Contains) 
B) toArray) 
C) retainAll) 
D) toString)

Question 5

Memory management methods of the vector class include all of the following except:

Accepted Answer

A) remove) 
B) trimToSize) 
C) capacity) 
D) size) 
A) remove) 
B) trimToSize) 
C) capacity) 
D) size)

Question 6

Write a Java statement to create a vector with initial capacity of 50.

Accepted Answer

Vector v =

Question 7

To change an existing element of a vector you must use the __________ method.

Accepted Answer

A) add) 
B) set) 
C) change) 
D) mutate) 
A) add) 
B) set) 
C) change) 
D) mutate)

Question 8

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

Accepted Answer

A) Vector 
B) AbstractMap 
C) HashMap 
D) HashSet 
A) Vector 
B) AbstractMap 
C) HashMap 
D) HashSet

Question 9

Write a method named displayList)that has one parameter of type Vector and has a return value of void.The method uses an iterator to display the contents of the Vector.

Accepted Answer

public static void displayList

Question 10

The difference between the List interface and the Set interface is that the Set interface does not impose an order on its unique elements.

Accepted Answer

A) True 
 B)False

Question 11

The hasNext)method of the Iterator interface has a return value of:

Accepted Answer

A) byte 
B) int 
C) boolean 
D) none of the above 
A) byte 
B) int 
C) boolean 
D) none of the above

Question 12

All of the following are methods of the Iterator interface except:

Accepted Answer

A) clear) 
B) hasNext) 
C) next) 
D) remove) 
A) clear) 
B) hasNext) 
C) next) 
D) remove)

Question 13

How can one retrieve all the values of a HashMap object?

Accepted Answer

h.values )returns al

Question 14

The method ___________ can be used to determine the number of elements in an ArrayList.

Accepted Answer

A) length) 
B) vectorLength) 
C) size) 
D) vectorSize) 
A) length) 
B) vectorLength) 
C) size) 
D) vectorSize)

Question 15

What must you do before adding a primitive type to a vector?

Accepted Answer

The primitive type must be con

Question 16

The method containsObject o)of the ArrayList class returns a value of type:

Accepted Answer

A) int 
B) char 
C) byte 
D) boolean 
A) int 
B) char 
C) byte 
D) boolean

Question 17

The primary interface/interfaces for a collection class is/are:

Accepted Answer

A) Collection 
B) Set 
C) List 
D) All of the above 
A) Collection 
B) Set 
C) List 
D) All of the above

Question 18

Write a Java statement that changes the value of element 27 to 5.0 in the resulting vector in number 3 above.

Accepted Answer

v.set26,ne

Question 19

The Collection class or interface that allows only unique elements is the ___________ class or interface.

Accepted Answer

A) List 
B) Set 
C) Vector 
D) all of the above 
A) List 
B) Set 
C) Vector 
D) all of the above

Question 20

The List interface is for collections that allow repetition of elements and do not impose an order on their elements.

Accepted Answer

A) True 
 B)False

Create a for loop to initially set the values of the vector created in number 1 above to the value of negative 1.0.

What is the purpose of the Java Iterator interface?

What is the difference between a vector's size and a vector's capacity?

All of the following methods are part of the Collection< T > interface except:

Memory management methods of the vector class include all of the following except:

Write a Java statement to create a vector with initial capacity of 50.

To change an existing element of a vector you must use the __________ method.

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

Write a method named displayList)that has one parameter of type Vector and has a return value of void.The method uses an iterator to display the contents of the Vector.

The difference between the List< T > interface and the Set< T > interface is that the Set< T > interface does not impose an order on its unique elements.

The hasNext)method of the Iterator interface has a return value of:

All of the following are methods of the Iterator interface except:

How can one retrieve all the values of a HashMap object?

The method ___________ can be used to determine the number of elements in an ArrayList.

What must you do before adding a primitive type to a vector?

The method containsObject o)of the ArrayList class returns a value of type:

The primary interface/interfaces for a collection class is/are:

Write a Java statement that changes the value of element 27 to 5.0 in the resulting vector in number 3 above.

The Collection class or interface that allows only unique elements is the ___________ class or interface.

The List interface is for collections that allow repetition of elements and do not impose an order on their elements.

Getting Started

Console Input and Output

Flow of Control

Defining Classes I

Defining Classes II

Arrays

Inheritance

Polymorphism and Abstract Classes

Exception Handling

File IO

Recursion

Uml and Patterns

Interfaces and Inner Classes

Generics and the Arraylist Class

Linked Data Structures

Swing I

Swing II

Java Never Ends

Applets

Filters

Exam 16: Collections,maps,and Iterators

Create a for loop to initially set the values of the vector created in number 1 above to the value of negative 1.0.

What is the purpose of the Java Iterator interface?

What is the difference between a vector's size and a vector's capacity?

All of the following methods are part of the Collection< T > interface except:

Memory management methods of the vector class include all of the following except:

Write a Java statement to create a vector with initial capacity of 50.

To change an existing element of a vector you must use the __________ method.

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

Write a method named displayList)that has one parameter of type Vector and has a return value of void.The method uses an iterator to display the contents of the Vector.

The difference between the List< T > interface and the Set< T > interface is that the Set< T > interface does not impose an order on its unique elements.

The hasNext)method of the Iterator interface has a return value of:

All of the following are methods of the Iterator interface except:

How can one retrieve all the values of a HashMap object?

The method ___________ can be used to determine the number of elements in an ArrayList.

What must you do before adding a primitive type to a vector?

The method containsObject o)of the ArrayList class returns a value of type:

The primary interface/interfaces for a collection class is/are:

Write a Java statement that changes the value of element 27 to 5.0 in the resulting vector in number 3 above.

The Collection class or interface that allows only unique elements is the ___________ class or interface.

The List interface is for collections that allow repetition of elements and do not impose an order on their elements.

Getting Started

Console Input and Output

Flow of Control

Defining Classes I

Defining Classes II

Arrays

Inheritance

Polymorphism and Abstract Classes

Exception Handling

File IO

Recursion

Uml and Patterns

Interfaces and Inner Classes

Generics and the Arraylist Class

Linked Data Structures

Swing I

Swing II

Java Never Ends

Applets

Filters