Java-Chapter 18 Exam

Which of the following types of data can be stored in arrays?

• Primitive data types

• strings

• References to any kind of object

• All of these can be stored in arrays

When the line of code below is run, what values will be stored in each of the array elements? int[] teamScores = new int[5];

• 0

• null

• false

• Java doesn't define an initial value, so the contents are random

Which answer will correctly declare and initialize a 5-element array with specific numeric values?

• int[] teamScores = new int(10,5,17,20,3);

• int teamScores = (10,5,17,20,3);

• int[] teamScores = {10,5,17,20,3};

• int[] teamScores = new int[10,5,17,20,3];

What are the minimum and maximum valid array index values for a 5-element array?

• 0 and 5

• 0 and 4

• 1 and 4

• 1 and 5

Given the code below, which statement will correctly set the very first array element equal to 10? int[] teamScores = new int[5];

• teamScores(1) = 10;

• teamScores[0] = 10;

• teamScores[10] = 0;

• teamScores = 10;

If the Score class has been defined, how many unique Score objects are created by the following code?

Score[] teamScores = new Score[4];

teamScores[0] = new Score();

teamScores[1] = new Score();

teamScores[2] = teamScores[1];

• 1

• 3

• 2

• 4

If the Score class has been defined, what phrases should replace the ??? marks to set up a standard for() loop to iterate over the entire array?

Score[] teamScores = new Score[4];

for (???)

{

teamScores[i] = new Score();

}

• int i=1; i<teamScores.length- 1; i++

• int i=0; i<=teamScores.length; i++

• int i=1; i<=teamScores.length-1; i++

• int i=0; i<teamScores.length; i++

If the Score class has been defined, what is the value in the size variable after the following code runs? Score[] teamScores = new Score[4];

teamScores[0] = new Score();

teamScores[1] = new Score();

teamScores[2] = teamScores[1];

int size = teamScores.length;

• 4

• 3

• 2

• 1

When using a while() loop to iterate over an array, what is true about the numeric index variable used to access the array elements?

• The while() loop will automatically declare, test, and update a numeric variable as part of the normal loop structure

• Using a while() loop eliminates your need for a numeric array index completely

• You need to manually declare a numeric index before the loop, test it in the logical expression, and update it inside the loop body

• None of these are true

What values are stored in the teamScores array elements after the following code is run?

int[] teamScores = new int[5];

for (int i=2; i<teamScores.length; i++)

{

teamScores[i]=1;

}

• 0, 0, 2, 3, 4

• 0, 1, 2, 3, 4

• 1, 2, 3, 4, 5

• 0, 0, 0, 0, 0