Solved

Here Is the Code for a Recursive Method for Binary

Question 110

Essay

Here is the code for a recursive method for binary search that is searching a sorted array of ints. The array is assumed to be sorted in ascending order.
// we are looking for the value stored in the parameter key
public static int binarySearch ( int [ ] arr, int key, int start,
int end )
{
System.out.println( "Start = " + start + "; end = " + end );
if ( start <= end )
{
int middle = ( start + end ) / 2;
if ( arr[middle] == key ) // found it at index middle
return middle;
else if ( arr[middle] > key ) // look left
return binarySearch( arr, key, start, middle - 1 );
else // look right
return binarySearch( arr, key, middle + 1, end );
}
else // not found
return -1;
}
We are running the following code:
int [ ] numbers = { 4, 6, 8, 10, 11, 12, 14, 16, 18 };
int found = binarySearch( numbers, 10, 0, 8 );
What is the output? Show what the output statement in the binarySearch method outputs. The question is not about the value of found; the value of found is 3.

Correct Answer:

verifed

Verified

Start = 0; end = 8
S...

View Answer

Unlock this answer now
Get Access to more Verified Answers free of charge

Related Questions

Unlock this Answer For Free Now!

View this answer and more for free by performing one of the following actions

qr-code

Scan the QR code to install the App and get 2 free unlocks

upload documents

Unlock quizzes for free by uploading documents