Linear Search — DSA Technical Interview Questions & Answers

Linear Search

Linear Search

  • Linear Search is a DSA topic. In plain words you use it for find roll 12 in a sorted list. Don’t start with a slogan — start with that picture.
  • Smallest example: linear vs binary. Type it, run it, and say what you see. If you can do that from memory, you know Linear Search.
  • From the example next to this theory: Linear search checks items one by one — O(n).
  • Trap: binary search on unsorted data. Fix that before you talk about advanced DSA.
  • Viva: what is Linear Search? Then show linear vs binary. Then name the trap.

Technical Interview Tip: What is Linear Search? Show this: linear vs binary. Trap: binary search on unsorted data.

Code Examples for Linear Search

Linear Search — working example

def linear_search(arr, target):
    for i, x in enumerate(arr):
        if x == target:
            return i
    return -1

print(linear_search([4, 2, 9, 1], 9))

Linear search checks items one by one — O(n).

How to Explain Linear Search to an Interviewer

What is Linear Search?

Used for find roll 12 a sorted list Not just the heading

Give one small example of Linear Search.

linear vs binary Linear search checks items one by one — O(n)

What mistake do beginners make with Linear Search?

binary search on unsorted data Show the fix

Where do you use Linear Search?

a sorted list find roll 12