Interview | Welkin Lan



Interview | Welkin Lan

Got a phone interview from Visa for new grad software developer. Interviewed with a manager from the global payment testing group. Ask Two questions:

  1. Given a ATM withdraw machine, and a list of available tokens: 100, 50, 20, 10. Each token has certain amounts. Find a solution that would make all as many types of tokens as possible.
  2. Suppose you are an engineer in fully charge for setting up an new elevator. List all the things you need to consider (security, etc)


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