Breadth First Search Algorithm — DSA Technical Interview Questions & Answers

Breadth First Search Algorithm

Breadth First Search Algorithm

  • Breadth First Search Algorithm 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 Breadth First Search Algorithm.
  • From the example next to this theory: Breadth First Search Algorithm — bFS explores level by level using a queue.
  • Trap: binary search on unsorted data. Fix that before you talk about advanced DSA.
  • Viva: what is Breadth First Search Algorithm? Then show linear vs binary. Then name the trap.

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

Code Examples for Breadth First Search Algorithm

Breadth First Search Algorithm — working example

from collections import deque

graph = {1: [2, 3], 2: [4], 3: [], 4: []}

def bfs(start):
    seen, q = {start}, deque([start])
    order = []
    while q:
        u = q.popleft()
        order.append(u)
        for v in graph[u]:
            if v not in seen:
                seen.add(v)
                q.append(v)
    return order

print(bfs(1))

Breadth First Search Algorithm — bFS explores level by level using a queue.

How to Explain Breadth First Search Algorithm to an Interviewer

What is Breadth First Search Algorithm?

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

Give one small example of Breadth First Search Algorithm.

linear vs binary Breadth First Search Algorithm — bFS explores level by level using a queue

What mistake do beginners make with Breadth First Search Algorithm?

binary search on unsorted data Show the fix

Where do you use Breadth First Search Algorithm?

a sorted list find roll 12