What is the worst-case time complexity for searching an element in an unsorted a

Practice Questions

Q1
What is the worst-case time complexity for searching an element in an unsorted array?
  1. O(1)
  2. O(n)
  3. O(log n)
  4. O(n log n)

Questions & Step-by-Step Solutions

What is the worst-case time complexity for searching an element in an unsorted array?
  • Step 1: Understand that an unsorted array means the elements are in no particular order.
  • Step 2: When searching for an element, you need to check each element one by one.
  • Step 3: In the worst-case scenario, the element you are looking for might be the last one in the array or it might not be there at all.
  • Step 4: If the array has 'n' elements, you may have to check all 'n' elements to find the target or confirm it's not present.
  • Step 5: Therefore, the time it takes to search in the worst case is proportional to the number of elements, which is expressed as O(n).
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