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What is the best-case time complexity of binary search?

Practice Questions

Q1
What is the best-case time complexity of binary search?
  1. O(n)
  2. O(log n)
  3. O(1)
  4. O(n log n)

Questions & Step-by-Step Solutions

What is the best-case time complexity of binary search?
  • Step 1: Understand what binary search is. It is a method to find an element in a sorted array by repeatedly dividing the search interval in half.
  • Step 2: Identify the best-case scenario. The best case occurs when the target element is located at the middle of the array on the first check.
  • Step 3: Recognize that if the target is found immediately, no further comparisons are needed.
  • Step 4: Conclude that finding the target in the middle takes a constant amount of time, which is represented as O(1).
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