EmSAT Achieve Exam  >  EmSAT Achieve Questions  >  What is the output of the following code snip... Start Learning for Free
What is the output of the following code snippet?
#include <iostream>
using namespace std;
int binarySearch(int arr[], int left, int right, int key) {
    if (left <= right) {
        int mid = left + (right - left) / 2;
        if (arr[mid] == key)
            return mid;
        if (arr[mid] > key)
            return binarySearch(arr, left, mid - 1, key);
        return binarySearch(arr, mid + 1, right, key);
    }
    return -1;
}
int main() {
    int arr[] = {2, 4, 6, 8, 10};
    int key = 8;
    int result = binarySearch(arr, 0, 4, key);
    cout << result;
    return 0;
}
  • a)
    -1
  • b)
    0
  • c)
    1
  • d)
    3
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
What is the output of the following code snippet?#include <iostream...
The code performs a binary search for the key element 8 in the given array. Since 8 is present at index 3, the output will be 3.
Free Test
Community Answer
What is the output of the following code snippet?#include <iostream...
Explanation:

Binary Search Algorithm:
- Binary search is a divide and conquer algorithm that efficiently searches for a target value within a sorted array.
- It compares the target value to the middle element of the array and eliminates half of the remaining elements each time.

Code Explanation:
- The given code defines a binarySearch function that searches for a key in a sorted array recursively.
- In the main function, an array {2, 4, 6, 8, 10} is defined, and the key to be searched is 8.
- The binarySearch function is called with the array, left index 0, right index 4, and the key 8.

Output:
- The binarySearch function will return the index of the key if found, otherwise -1.
- In this case, the key 8 is found at index 3 in the array {2, 4, 6, 8, 10}.
- Therefore, the output of the code will be 3.
Therefore, the correct output of the code snippet is option 'C' (1).
Attention EmSAT Achieve Students!
To make sure you are not studying endlessly, EduRev has designed EmSAT Achieve study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in EmSAT Achieve.
Explore Courses for EmSAT Achieve exam

Similar EmSAT Achieve Doubts

Top Courses for EmSAT Achieve

What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer?
Question Description
What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer? for EmSAT Achieve 2024 is part of EmSAT Achieve preparation. The Question and answers have been prepared according to the EmSAT Achieve exam syllabus. Information about What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for EmSAT Achieve 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer?.
Solutions for What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for EmSAT Achieve. Download more important topics, notes, lectures and mock test series for EmSAT Achieve Exam by signing up for free.
Here you can find the meaning of What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer?, a detailed solution for What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice What is the output of the following code snippet?#include <iostream>using namespace std;int binarySearch(int arr[], int left, int right, int key) { if (left <= right) { int mid = left + (right - left) / 2; if (arr[mid] == key) return mid; if (arr[mid] > key) return binarySearch(arr, left, mid - 1, key); return binarySearch(arr, mid + 1, right, key); } return -1;}int main() { int arr[] = {2, 4, 6, 8, 10}; int key = 8; int result = binarySearch(arr, 0, 4, key); cout << result; return 0;}a)-1b)0c)1d)3Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice EmSAT Achieve tests.
Explore Courses for EmSAT Achieve exam

Top Courses for EmSAT Achieve

Explore Courses

Suggested Free Tests

Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev