Design a vending machine. The vending machine should allow a user to:

Select a product from a list of available products.
Insert money into the vending machine.
Receive the selected product if enough money has been inserted.
Receive any change due after a successful purchase.
Cancel the transaction and receive a refund of the inserted money.
The vending machine should also allow an administrator to:
- Add new products to the vending machine.
- Restock existing products.
- Withdraw money from the vending machine.
- Set product prices.

Requirements

Interview Simulation

Experience a realistic interview conversation. The interviewer will ask clarifying questions,and you'll reveal your understanding of the requirements.

Interviewer

Let's start by understanding the scope. What are the core functionalities this system needs to provide?

💡 Interview Tip

Identify the Actors (Who uses the system?) and their Use Cases (What are they trying to achieve?). Start with the 'Happy Path' scenarios.

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Design a Vending Machine

Requirements

Interview Simulation

Functional Requirements

💡 Interview Tip

Non-Functional Requirements

Core Entity Identification

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