Design an ATM System

Medium

+200 XP

PRO

State PatternStrategy PatternConcurrency

Design an ATM (Automated Teller Machine) system that allows users to perform basic banking transactions such as checking balance, withdrawing cash, and depositing cash. The system should handle user authentication, communicate with the bank's main system, and support concurrent transactions while maintaining data consistency.

What You'll Build

The ATM should allow users to perform basic actions such as checking their account balance, withdrawing cash, and depositing cash.
Users must authenticate themselves before using the ATM by inserting their ATM card and entering their PIN (Personal Identification Number).
The ATM system should communicate with the bank's main system to verify the user's account and confirm and process transactions like withdrawals and deposits.
The ATM should include a cash dispenser that gives money to users when they withdraw cash, supporting multiple note denominations.
The system must work correctly when multiple users or transactions happen at the same time, making sure account data stays accurate and consistent.
...and more

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Step-by-Step Guidance

Follow our systematic 8-step approach to design the system from scratch. Learn how to identify actors, assign responsibilities, and create class diagrams.

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Interactive UML Builder

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Multi-Language Support

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Design Patterns

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Complete Solutions

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