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In a recursive implementation of binary search, what is the base case?

Practice Questions

Q1
In a recursive implementation of binary search, what is the base case?
  1. When the array is empty
  2. When the target is found
  3. When the left index exceeds the right index
  4. When the mid index is zero

Questions & Step-by-Step Solutions

In a recursive implementation of binary search, what is the base case?
  • Step 1: Understand that binary search is a method to find a target value in a sorted array.
  • Step 2: In a recursive function, we keep dividing the array into halves.
  • Step 3: We use two indices: 'left' (the start of the current search range) and 'right' (the end of the current search range).
  • Step 4: The base case is a condition that stops the recursion. For binary search, this happens when 'left' is greater than 'right'.
  • Step 5: When 'left' > 'right', it means the target value is not in the array, and we should stop searching.
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