Question 1

Which of the following for loops is valid, given the following declaration? String[] names = {"abc", "def", "ghi", "jkl"};

Accepted Answer

A)  for (int i = 0; i < names.length; i++)
System.out.println(names[i].length); 
B)  for (int i = 0; i < names.length(); i++)
System.out.println(names[i].length); 
C)  for (int i = 0; i < names.length; i++)
System.out.println(names[i].length()); 
D)  for (int i = 0; i < names.length(); i++)
System.out.println(names[i].length()); 
A)  for (int i = 0; i < names.length; i++)
System.out.println(names[i].length); 
B)  for (int i = 0; i < names.length(); i++)
System.out.println(names[i].length); 
C)  for (int i = 0; i < names.length; i++)
System.out.println(names[i].length()); 
D)  for (int i = 0; i < names.length(); i++)
System.out.println(names[i].length());

Question 2

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 3

Each array in Java has a public field named ____________ that contains the number of elements in the array.

Accepted Answer

A)  size 
B)  capacity 
C)  length 
D)  limit 
A)  size 
B)  capacity 
C)  length 
D)  limit

Question 4

What would be the results of the following code? final int SIZE = 25;
Int[] array1 = new int[SIZE];
… // Code that will put values in array1
Int value = 0;
For (int a = 0; a <= array1.length; a++)
{
Value += array1[a];
}

Accepted Answer

A)  value contains the highest value in array1 
B)  value contains the lowest value in array1 
C)  value contains the sum of all the values in array1 
D)  This would cause the program to crash 
A)  value contains the highest value in array1 
B)  value contains the lowest value in array1 
C)  value contains the sum of all the values in array1 
D)  This would cause the program to crash

Which of the following for loops is valid, given the following declaration? String[] names = {"abc", "def", "ghi", "jkl"};

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

Each array in Java has a public field named ____________ that contains the number of elements in the array.

What would be the results of the following code? final int SIZE = 25; Int[] array1 = new int[SIZE]; … // Code that will put values in array1 Int value = 0; For (int a = 0; a <= array1.length; a++) { Value += array1[a]; }

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File IO

A First Look at GUI Applications

Advanced GUI Applications

Applets and More

Creating GUI Applications With Javafx and Scene Builder

Recursion

Databases

Filters

Exam 7: Arrays and the Arraylist Class

Which of the following for loops is valid, given the following declaration? String[] names = {"abc", "def", "ghi", "jkl"};

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

Each array in Java has a public field named ____________ that contains the number of elements in the array.

What would be the results of the following code? final int SIZE = 25; Int[] array1 = new int[SIZE]; … // Code that will put values in array1 Int value = 0; For (int a = 0; a <= array1.length; a++) { Value += array1[a]; }

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Exceptions and Advanced File IO

A First Look at GUI Applications

Advanced GUI Applications

Applets and More

Creating GUI Applications With Javafx and Scene Builder

Recursion

Databases

Filters