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Which of the following C++ functions correctly implements binary search?

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Question: Which of the following C++ functions correctly implements binary search?

Options:

  1. int binarySearch(int arr[], int l, int r, int x)
  2. void binarySearch(int arr[], int x)
  3. int binarySearch(int arr[], int x)
  4. bool binarySearch(int arr[], int l, int r)

Correct Answer: int binarySearch(int arr[], int l, int r, int x)

Solution: 

The function \'int binarySearch(int arr[], int l, int r, int x)\' is a correct implementation signature for binary search, taking the array, left index, right index, and the target value.

Which of the following C++ functions correctly implements binary search?

Practice Questions

Q1
Which of the following C++ functions correctly implements binary search?
  1. int binarySearch(int arr[], int l, int r, int x)
  2. void binarySearch(int arr[], int x)
  3. int binarySearch(int arr[], int x)
  4. bool binarySearch(int arr[], int l, int r)

Questions & Step-by-Step Solutions

Which of the following C++ functions correctly implements binary search?
  • Step 1: Understand what binary search is. It is a method to find a target value in a sorted array by repeatedly dividing the search interval in half.
  • Step 2: Identify the function signature. The function should take an array, the left index, the right index, and the target value as parameters.
  • Step 3: Check the function signature 'int binarySearch(int arr[], int l, int r, int x)'. It has all the required parameters: an array (arr), a left index (l), a right index (r), and a target value (x).
  • Step 4: Confirm that the function returns an integer, which is typical for binary search to indicate the index of the found element or -1 if not found.
  • Step 5: Conclude that this function signature is correct for implementing binary search.
No concepts available.
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