Below is a recursive version of binary search, which was not presented in class. The method contains an error because: 1) public static int binarySearch(int[] a, int hi, int low, int mid, int x) { 2) 3) 4) 5) 6) 7) 8) 9) 10) } if (low > hi) return -1; else if (a[mid] return mid; else if (x < a[mid]) return binarysearch(a,mid-1, low,(low+mid-1)/2,x); х) =3= else return binarySearch(a,hi,mid+1, (mid+1+hi)/2,x); O it never calculates the midpoint O it incorrectly mixes up parameters in the recursive call on line 7 O it incorrectly mixes up parameters in the recursive call on line 9 O it doesn't have a basis case none of the above

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Below is a recursive version of binary search, which was not presented in
class.
The method contains an error because:
1) public static int binarySearch(int[] a, int hi, int low, int mid, int x)
{
2)
3)
4)
5)
6)
if (low > hi)
return -1;
else if (a[mid] == x)
return mid;
else if (x < a[mid])
return binarysearch(a,mid-1, low, (low+mid-1)/2,x);
3%3D
8)
9)
10) }
else
return binarysearch(a, hi,mid+1, (mid+1+hi)/2,x);
O it never calculates the midpoint
O it incorrectly mixes up parameters in the recursive call on line 7
O it incorrectly mixes up parameters in the recursive call on line 9
O it doesn't have a basis case
O none of the above
Transcribed Image Text:Below is a recursive version of binary search, which was not presented in class. The method contains an error because: 1) public static int binarySearch(int[] a, int hi, int low, int mid, int x) { 2) 3) 4) 5) 6) if (low > hi) return -1; else if (a[mid] == x) return mid; else if (x < a[mid]) return binarysearch(a,mid-1, low, (low+mid-1)/2,x); 3%3D 8) 9) 10) } else return binarysearch(a, hi,mid+1, (mid+1+hi)/2,x); O it never calculates the midpoint O it incorrectly mixes up parameters in the recursive call on line 7 O it incorrectly mixes up parameters in the recursive call on line 9 O it doesn't have a basis case O none of the above
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