Topic 6.1 Video 2

I have viewed the video at https://apclassroom.collegeboard.org/d/3fdsi6azw2?sui=8,6

from start to finish

• True
• False

Consider the following method which is intended to return the position of find within the String referenced at the middle index of arr. You may assume that the length of the arr is odd.

public static int findInMiddle (String [] arr, String find)
{
return /*missing code*/;
}

Which of the following could replace /*missing code*/ to complete the method as specified?

• arr[ ].indexOf(find)

• arr.indexOf(find)

• arr[arr.length/2+1].indexOf(find)

• arr[arr.length].indexOf(find)

• arr[arr.length/2].indexOf(find)

Consider the method on the left.

The mystery method is called from another method in the same class:

int[ ] list = {3, 7, 2, 9, 8};

int result = mystery(list);

What is stored in result after executing the above code?

• 2.5

• 4

• 8

• 11

• 11.5

Consider the segment of code to the left:

Why does the code cause a compile error?

• Since grades is an array of type double, it cannot be used to store int values of 50, 70 and 89.

• Since grades is created with an initializer list, the values of the elements of grades cannot be changed.

• Elements of arrays cannot be updated based on the current element value, i.e., the += operator cannot be used with array elements.

• The grades array contains three elements with indices 0, 1, and 2 therefore grades[3] causes an ArrayIndexOutOfBoundsException to be thrown

• The code does not cause a compile error.

Consider the method to the left.

Which of the following, when occurring in another method in the same class as mystery, would display the value true?

• 
• 
• 
• 
• 

Consider the code segment to the left.

What is printed as a result of executing the code segment?

• 0

• 8

• 18

• 32

• ArrayIndexOutOfBoundsException