高频题（0）
1. Island Problem in a 0,1 Matrix
In a 0,1 matrix, solve the classic island problem to find the maximum area of an island. The solution should use the Breadth-First Search (BFS) algorithm. Additionally, write test cases using numpy to automatically generate test cases.
2. Testing Interview
Discuss and clarify testing requirements with the interviewer to solve a simple testing problem.
3. Coding Challenge
Solve a simple proprietary coding problem provided by the company during the coding interview round.
4. Design a Bidding System
Design a bidding system as part of a system design interview round.
