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If the target value is not present in the array, what will binary search return?

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Question: If the target value is not present in the array, what will binary search return?

Options:

  1. The index of the closest value
  2. The index of the first element
  3. The index of the last element
  4. -1

Correct Answer: -1

Solution: 

If the target value is not found, binary search typically returns -1 to indicate absence.

If the target value is not present in the array, what will binary search return?

Practice Questions

Q1
If the target value is not present in the array, what will binary search return?
  1. The index of the closest value
  2. The index of the first element
  3. The index of the last element
  4. -1

Questions & Step-by-Step Solutions

If the target value is not present in the array, what will binary search return?
  • Step 1: Understand that binary search is a method used to find a target value in a sorted array.
  • Step 2: If the target value is present in the array, binary search will return the index of that value.
  • Step 3: If the target value is not present in the array, binary search will not find it.
  • Step 4: In this case, binary search typically returns -1 to indicate that the target value is absent.
  • Binary Search – A search algorithm that finds the position of a target value within a sorted array.
  • Return Values – Understanding what a function returns when a condition (like absence of a target) is met.
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