Question 1

Which of the following is a correct method header for receiving a two-dimensional array as an argument?

Accepted Answer

A)  public static void passMyArray(int[]myArray1, int[]myArray2) 
B)  public static void passMyArray(int[][] myArray) 
C)  public static void passMyArray[][](int myArray) 
D)  public static void passMyArray(array myArray) 
A)  public static void passMyArray(int[]myArray1, int[]myArray2) 
B)  public static void passMyArray(int[][] myArray) 
C)  public static void passMyArray[][](int myArray) 
D)  public static void passMyArray(array myArray)

Question 2

Given the following two-dimensional array declaration, which statement is true? 
int[ ][ ] numbers = new int[6][9];

Accepted Answer

A)  The numbers array has 54 rows. 
B)  The numbers array has 15 rows. 
C)  The numbers array has 6 rows and 9 columns. 
D)  The numbers array has 6 columns and 9 rows. 
A)  The numbers array has 54 rows. 
B)  The numbers array has 15 rows. 
C)  The numbers array has 6 rows and 9 columns. 
D)  The numbers array has 6 columns and 9 rows.

Question 3

An array of String objects

Accepted Answer

A)  is arranged the same as an array of primitive objects 
B)  is compressed to four bytes for each element 
C)  must be initialized when the array is declared 
D)  consists of an array of references to String objects 
A)  is arranged the same as an array of primitive objects 
B)  is compressed to four bytes for each element 
C)  must be initialized when the array is declared 
D)  consists of an array of references to String objects

Question 4

What does specify in the following statement? ArrayList nameList = new ArrayList();

Accepted Answer

A)  It specifies that String objects may not be stored in the ArrayList object. 
B)  It specifies that everything stored in the ArrayList object will be converted to a String object. 
C)  It specifies that only String objects may be stored in the ArrayList object. 
D)  It specifies that the ArrayList will be converted to a String array. 
A)  It specifies that String objects may not be stored in the ArrayList object. 
B)  It specifies that everything stored in the ArrayList object will be converted to a String object. 
C)  It specifies that only String objects may be stored in the ArrayList object. 
D)  It specifies that the ArrayList will be converted to a String array.

Question 5

What would be the result after the following code is executed?
 int[ ] numbers = {50, 10, 15, 20, 25, 100, 30};
Int value = 0;
For (int i = 1; i < numbers.length; i++)
Value += numbers[i];

Accepted Answer

A)  The value variable will contain the average of all the values in the numbers array. 
B)  The value variable will contain the sum of all the values in the numbers array. 
C)  The value variable will contain the lowest value in the numbers array. 
D)  The value variable will contain the highest value in the numbers array. 
A)  The value variable will contain the average of all the values in the numbers array. 
B)  The value variable will contain the sum of all the values in the numbers array. 
C)  The value variable will contain the lowest value in the numbers array. 
D)  The value variable will contain the highest value in the numbers array.

Question 6

If numbers is a two-dimensional array, which of the following would give the number of columns in row r?

Accepted Answer

A)  numbers.length 
B)  numbers.length[r] 
C)  numbers[r].length 
D)  numbers[r].length[r] 
A)  numbers.length 
B)  numbers.length[r] 
C)  numbers[r].length 
D)  numbers[r].length[r]

Question 7

Which method is used to determine the number of items stored in an ArrayList object?

Accepted Answer

A)  items 
B)  listLength 
C)  size 
D)  volume 
A)  items 
B)  listLength 
C)  size 
D)  volume

Question 8

What is the value of scores[2][3] in the following array? 
int[ ][ ] scores = { {88, 80, 79, 92}.
{75, 84, 93, 80},
{98, 95, 92, 94},
{91, 84, 88, 96} };

Accepted Answer

A)  95 
B)  84 
C)  94 
D)  93 
A)  95 
B)  84 
C)  94 
D)  93

Question 9

A ragged array is

Accepted Answer

A)  a two-dimensional array where the rows have different numbers of columns 
B)  a one-dimensional array for which the number of elements is unknown 
C)  a two-dimensional array for which the number of rows is unknown 
D)  a partially initialized two-dimensional array of ranged values 
A)  a two-dimensional array where the rows have different numbers of columns 
B)  a one-dimensional array for which the number of elements is unknown 
C)  a two-dimensional array for which the number of rows is unknown 
D)  a partially initialized two-dimensional array of ranged values

Question 10

You can use the __________ method to replace an item at a specific location in an ArrayList.

Accepted Answer

A)  set 
B)  remove 
C)  replace 
D)  add 
A)  set 
B)  remove 
C)  replace 
D)  add

Question 11

In order to do a binary search on an array

Accepted Answer

A)  the array must first be sorted 
B)  you must first do a sequential search to be sure the element you are looking for is there 
C)  the values of the array must be numeric 
D)  All of these are true 
A)  the array must first be sorted 
B)  you must first do a sequential search to be sure the element you are looking for is there 
C)  the values of the array must be numeric 
D)  All of these are true

Question 12

Which of the following statements is(are) true about this code? final int ARRAY_SIZE = 10;
Long[] array1 = new long[ARRAY_SIZE];

Accepted Answer

A)  It declares array1 to be a reference to an array of long values. 
B)  It will allow valid subscripts in the range of 0 through 9. 
C)  It creates an instance of an array of ten long values. 
D)  All of these are true. 
A)  It declares array1 to be a reference to an array of long values. 
B)  It will allow valid subscripts in the range of 0 through 9. 
C)  It creates an instance of an array of ten long values. 
D)  All of these are true.

Question 13

Which of the following methods returns a string representing all of the items stored in an ArrayList object?

Accepted Answer

A)  show 
B)  toString 
C)  print 
D)  getList 
A)  show 
B)  toString 
C)  print 
D)  getList

Question 14

The sequential search algorithm

Accepted Answer

A)  returns 1 if the value being searched for is found or -1 if the value is not found 
B)  requires the array to be ascending order 
C)  uses a loop to sequentially step through an array, starting with the first element 
D)  All of these are true 
A)  returns 1 if the value being searched for is found or -1 if the value is not found 
B)  requires the array to be ascending order 
C)  uses a loop to sequentially step through an array, starting with the first element 
D)  All of these are true

Question 15

Which of the following is a valid declaration for a ragged array with five rows but no columns?

Accepted Answer

A)  int[ ][ ] ragged = new int[5]; 
B)  int[ ][ ] ragged = new int[][5]; 
C)  int[ ][ ] ragged = new int[5][]; 
D)  int[ ] ragged = new int[5]; 
A)  int[ ][ ] ragged = new int[5]; 
B)  int[ ][ ] ragged = new int[][5]; 
C)  int[ ][ ] ragged = new int[5][]; 
D)  int[ ] ragged = new int[5];

Question 16

To return an array of long values from a method, which return type should be used for the method?

Accepted Answer

A)  long[ARRAY_SIZE] 
B)  array 
C)  long[] 
D)  long 
A)  long[ARRAY_SIZE] 
B)  array 
C)  long[] 
D)  long

Question 17

What would be the result after the following code is executed? 
int[ ] numbers = {40, 3, 5, 7, 8, 12, 10};
Int value = numbers[0];
For (int i = 1; i < numbers.length; i++)
{
If (numbers[i] < value)
Value = numbers[i];
}

Accepted Answer

A)  The value variable will contain the average of all the values in the numbers array. 
B)  The value variable will contain the sum of all the values in the numbers array. 
C)  The value variable will contain the lowest value in the numbers array. 
D)  The value variable will contain the highest value in the numbers array. 
A)  The value variable will contain the average of all the values in the numbers array. 
B)  The value variable will contain the sum of all the values in the numbers array. 
C)  The value variable will contain the lowest value in the numbers array. 
D)  The value variable will contain the highest value in the numbers array.

Question 18

Java does not limit the number of dimensions an array may have.

Accepted Answer

A) True 
 B)False

Question 19

The Java compiler will display an error message when it processes a statement that uses an invalid subscript.

Accepted Answer

A) True 
 B)False

Question 20

A sorting algorithm is used to locate a specific item in a larger collection of data.

Accepted Answer

A) True 
 B)False

Which of the following is a correct method header for receiving a two-dimensional array as an argument?

Given the following two-dimensional array declaration, which statement is true? int[ ][ ] numbers = new int[6][9];

An array of String objects

What does <String> specify in the following statement? ArrayList<String> nameList = new ArrayList<String>();

What would be the result after the following code is executed? int[ ] numbers = {50, 10, 15, 20, 25, 100, 30}; Int value = 0; For (int i = 1; i < numbers.length; i++) Value += numbers[i];

If numbers is a two-dimensional array, which of the following would give the number of columns in row r?

Which method is used to determine the number of items stored in an ArrayList object?

What is the value of scores[2][3] in the following array? int[ ][ ] scores = { {88, 80, 79, 92}. {75, 84, 93, 80}, {98, 95, 92, 94}, {91, 84, 88, 96} };

A ragged array is

You can use the __________ method to replace an item at a specific location in an ArrayList.

In order to do a binary search on an array

Which of the following statements is(are) true about this code? final int ARRAY_SIZE = 10; Long[] array1 = new long[ARRAY_SIZE];

Which of the following methods returns a string representing all of the items stored in an ArrayList object?

The sequential search algorithm

Which of the following is a valid declaration for a ragged array with five rows but no columns?

To return an array of long values from a method, which return type should be used for the method?

What would be the result after the following code is executed? int[ ] numbers = {40, 3, 5, 7, 8, 12, 10}; Int value = numbers[0]; For (int i = 1; i < numbers.length; i++) { If (numbers[i] < value) Value = numbers[i]; }

Java does not limit the number of dimensions an array may have.

The Java compiler will display an error message when it processes a statement that uses an invalid subscript.

A sorting algorithm is used to locate a specific item in a larger collection of data.

Introduction to Computers and Java

Java Fundamentals

A First Look at Classes and Objects

Decision Structures

Loops and Files

A Second Look at Classes and Objects

Text Processing and Wrapper Classes

Inheritance

Exceptions and Advanced File Io

Java-Fx: Gui Programming and Basic Controls

Java-Fx: Advanced Controls

Java-Fx: Graphics, Effects, and Media

Recursion

Databases

Filters

Exam 7: Arrays and the Arraylist Class

Which of the following is a correct method header for receiving a two-dimensional array as an argument?

Given the following two-dimensional array declaration, which statement is true? int[ ][ ] numbers = new int[6][9];

An array of String objects

What does <String> specify in the following statement? ArrayList<String> nameList = new ArrayList<String>();

What would be the result after the following code is executed? int[ ] numbers = {50, 10, 15, 20, 25, 100, 30}; Int value = 0; For (int i = 1; i < numbers.length; i++) Value += numbers[i];

If numbers is a two-dimensional array, which of the following would give the number of columns in row r?

Which method is used to determine the number of items stored in an ArrayList object?

What is the value of scores[2][3] in the following array? int[ ][ ] scores = { {88, 80, 79, 92}. {75, 84, 93, 80}, {98, 95, 92, 94}, {91, 84, 88, 96} };

A ragged array is

You can use the __________ method to replace an item at a specific location in an ArrayList.

In order to do a binary search on an array

Which of the following statements is(are) true about this code? final int ARRAY_SIZE = 10; Long[] array1 = new long[ARRAY_SIZE];

Which of the following methods returns a string representing all of the items stored in an ArrayList object?

The sequential search algorithm

Which of the following is a valid declaration for a ragged array with five rows but no columns?

To return an array of long values from a method, which return type should be used for the method?

What would be the result after the following code is executed? int[ ] numbers = {40, 3, 5, 7, 8, 12, 10}; Int value = numbers[0]; For (int i = 1; i < numbers.length; i++) { If (numbers[i] < value) Value = numbers[i]; }

Java does not limit the number of dimensions an array may have.

The Java compiler will display an error message when it processes a statement that uses an invalid subscript.

A sorting algorithm is used to locate a specific item in a larger collection of data.

Introduction to Computers and Java

Java Fundamentals

A First Look at Classes and Objects

Decision Structures

Loops and Files

A Second Look at Classes and Objects

Text Processing and Wrapper Classes

Inheritance

Exceptions and Advanced File Io

Java-Fx: Gui Programming and Basic Controls

Java-Fx: Advanced Controls

Java-Fx: Graphics, Effects, and Media

Recursion

Databases

Filters