Grokking the Low Level Design Interview Using OOD Principles/

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Key Insights and Tips: Designing ATM

Learn to avoid design pitfalls, prepare for interviews, and test your knowledge of designing ATM.

We'll cover the following...

Common mistakes
Key interview tips
Test your understanding
Related case studies

Congratulations on completing the case study for designing an ATM System. This lesson builds on your learning by highlighting common design mistakes, offering key interview tips, and including a short quiz to assess your understanding. You’ll also find related case studies that strengthen your grasp of modular, state-driven object-oriented design.

Common mistakes

Avoiding these common mistakes will help you create a more reliable and scalable ATM:

Poor state modeling: Using conditionals instead of concrete states like IdleState, HasCardState, or CashWithdrawalState leads to tangled ...