What will be the result of binary search if the target value is not present in t

Practice Questions

Q1
What will be the result of binary search if the target value is not present in the array?
  1. Returns the index of the closest value
  2. Returns -1
  3. Returns the index of the last element
  4. Returns the index of the first element

Questions & Step-by-Step Solutions

What will be the result of binary search if the target value is not present in the array?
  • Step 1: Start with a sorted array and a target value that you want to find.
  • Step 2: Set two pointers, one at the beginning of the array (left) and one at the end (right).
  • Step 3: Calculate the middle index of the array using the formula: middle = (left + right) / 2.
  • Step 4: Check if the value at the middle index is equal to the target value.
  • Step 5: If it is equal, return the middle index as the result.
  • Step 6: If the target value is less than the middle value, move the right pointer to middle - 1.
  • Step 7: If the target value is greater than the middle value, move the left pointer to middle + 1.
  • Step 8: Repeat steps 3 to 7 until the left pointer is greater than the right pointer.
  • Step 9: If the left pointer exceeds the right pointer, it means the target value is not in the array.
  • Step 10: Return -1 to indicate that the target value is absent.
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