Question 1

What will be the result of executing the following code? int[] x = {0,1,2,3,4,5};

Accepted Answer

A)  An array of 6 values ranging from 0 through 5 and referenced by the variable x will be created 
B)  A compilation error will occur 
C)  The program will crash when it is executed 
D)  The value of x[1] will be 0,x[2] will be 0,x[3] will be 0,x[4] will be 0,x[5] will be 0,and x[6] will be 0. 
A)  An array of 6 values ranging from 0 through 5 and referenced by the variable x will be created 
B)  A compilation error will occur 
C)  The program will crash when it is executed 
D)  The value of x[1] will be 0,x[2] will be 0,x[3] will be 0,x[4] will be 0,x[5] will be 0,and x[6] will be 0. A

Question 2

If final int SIZE = 15 and int[] x = new int[SIZE],what would be the range of subscript values that could be used with x[]?

Accepted Answer

A)  1 through 15 
B)  1 through 14 
C)  0 through 14 
D)  0 through 15 
A)  1 through 15 
B)  1 through 14 
C)  0 through 14 
D)  0 through 15 C

Question 3

What will be the value of x[8] after the following code has been executed? final int SUB = 12;
Int[] x = new int[SUB];
Int y = 20;
For(int i = 0;i < SUB;i++)
{
X[i] = y;
Y += 5;
}

Accepted Answer

A)  50 
B)  55 
C)  60 
D)  65 
A)  50 
B)  55 
C)  60 
D)  65 C

Question 4

The purpose of the sequential search algorithm is to rearrange the elements of an array so they appear in order from the lowest value to the highest value.

Accepted Answer

A) True 
 B)False

Question 5

What will be the results of the following code? final int ARRAY_SIZE = 5;
Float[] x = float[ARRAY_SIZE];
For(int i = 1;i < = ARRAY_SIZE;i++)
{
X[i] = 10.0;
}

Accepted Answer

A)  All the values in the array are initialized to 10.0 
B)  All the values,except the first,are set to 10.0 
C)  An error will occur when the program runs. 
D)  There will be a compilation error 
A)  All the values in the array are initialized to 10.0 
B)  All the values,except the first,are set to 10.0 
C)  An error will occur when the program runs. 
D)  There will be a compilation error

Question 6

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

Accepted Answer

A)  public static void passArray(int[2]) 
B)  public static void passArray(int [][]) 
C)  public static void passArray(int[1][2]) 
D)  public static void passArray(int[],int[]) 
A)  public static void passArray(int[2]) 
B)  public static void passArray(int [][]) 
C)  public static void passArray(int[1][2]) 
D)  public static void passArray(int[],int[])

Question 7

You can use this ArrayList class method to replace an item at a specific location in an ArrayList.

Accepted Answer

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

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

The String[] args parameter in the main method header allows the program to receive arguments from the operating system command-line.

Accepted Answer

A) True 
 B)False

Question 10

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

Question 11

For the following code,what would be the value of str[2]? String[] str = {"abc","def","ghi","jkl"};

Accepted Answer

A)  "ghi" 
B)  "def" 
C)  A reference to the String "ghi" 
D)  A reference to the String "def" 
A)  "ghi" 
B)  "def" 
C)  A reference to the String "ghi" 
D)  A reference to the String "def"

Question 12

Given that String[] str has been initialized,to get a copy of str[0] with all characters converted to upper case,use the following statement:

Accepted Answer

A)  str.uppercase(); 
B)  str[0].upperCase(); 
C)  str.toUpperCase(); 
D)  str[0].toUpperCase(); 
A)  str.uppercase(); 
B)  str[0].upperCase(); 
C)  str.toUpperCase(); 
D)  str[0].toUpperCase();

Question 13

When an individual element of an array is passed to a method

Accepted Answer

A)  a reference to the array is passed 
B)  it is passed like any other variable 
C)  the method does not have direct access to the original array 
D)  All of the above 
A)  a reference to the array is passed 
B)  it is passed like any other variable 
C)  the method does not have direct access to the original array 
D)  All of the above

Question 14

When an array of objects is declared,but not initialized,the array values are set to null.

Accepted Answer

A) True 
 B)False

Question 15

In memory,an array of String objects

Accepted Answer

A)  consists of elements,each of which is a reference to a String object. 
B)  is always implemented as a ragged array. 
C)  consists of elements,each of which is a String object. 
D)  must be initialized when the array is declared. 
A)  consists of elements,each of which is a reference to a String object. 
B)  is always implemented as a ragged array. 
C)  consists of elements,each of which is a String object. 
D)  must be initialized when the array is declared.

Question 16

This ArrayList class method deletes an item from an ArrayList.

Accepted Answer

A)  remove 
B)  delete 
C)  erase 
D)  purge 
A)  remove 
B)  delete 
C)  erase 
D)  purge

Question 17

What will be the value of x[1] after the following code is executed? int[] x = {22,33,44};
ArrayProcess(x[1]);
)..
Public static void arrayProcess(int a)
{
A = a + 5;
}

Accepted Answer

A)  27 
B)  33 
C)  38 
D)  49 
A)  27 
B)  33 
C)  38 
D)  49

Question 18

A search algorithm...

Accepted Answer

A)  is a way to locate a specific item in a larger collection of data 
B)  is rarely used with arrays 
C)  arranges array elements in order from lowest to highest 
D)  arranges array elements in order from highest to lowest 
A)  is a way to locate a specific item in a larger collection of data 
B)  is rarely used with arrays 
C)  arranges array elements in order from lowest to highest 
D)  arranges array elements in order from highest to lowest

Question 19

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

Accepted Answer

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

Question 20

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

Accepted Answer

A)  Declares array1 to be a reference to an array of long values 
B)  Creates an instance of an array of 10 long values 
C)  Will allow valid subscripts in the range of 0 - 9 
D)  All of the above 
A)  Declares array1 to be a reference to an array of long values 
B)  Creates an instance of an array of 10 long values 
C)  Will allow valid subscripts in the range of 0 - 9 
D)  All of the above

Exam 8: Arrays and the Arraylist Class

What will be the result of executing the following code? int[] x = {0,1,2,3,4,5};

If final int SIZE = 15 and int[] x = new int[SIZE],what would be the range of subscript values that could be used with x[]?

What will be the value of x[8] after the following code has been executed? final int SUB = 12; Int[] x = new int[SUB]; Int y = 20; For(int i = 0;i < SUB;i++) { X[i] = y; Y += 5; }

The purpose of the sequential search algorithm is to rearrange the elements of an array so they appear in order from the lowest value to the highest value.

What will be the results of the following code? final int ARRAY_SIZE = 5; Float[] x = float[ARRAY_SIZE]; For(int i = 1;i < = ARRAY_SIZE;i++) { X[i] = 10.0; }

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

You can use this ArrayList class method to replace an item at a specific location in an ArrayList.

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

The String[] args parameter in the main method header allows the program to receive arguments from the operating system command-line.

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} };

For the following code,what would be the value of str[2]? String[] str = {"abc","def","ghi","jkl"};

Given that String[] str has been initialized,to get a copy of str[0] with all characters converted to upper case,use the following statement:

When an individual element of an array is passed to a method

When an array of objects is declared,but not initialized,the array values are set to null.

In memory,an array of String objects

This ArrayList class method deletes an item from an ArrayList.

What will be the value of x[1] after the following code is executed? int[] x = {22,33,44}; ArrayProcess(x[1]); ).. Public static void arrayProcess(int a) { A = a + 5; }

A search algorithm...

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

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

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

A First Look at Gui Applications

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File Io

Advanced Gui Applications

Applets and More

Recursion

Sorting, Searching, and Algorithm Analysis

Generics

Collections

Array-Based Lists

Linked Lists

Stacks and Queues

Binary Trees, Avl Trees, and Priority Queues

Filters