Design ATM system.

1.	Design ATM system.
Answer» ATMs are used for depositing and withdrawing money from customers. It is also useful for checking the account balance. What are some of the required features? Each user should have at least one bank account that is linked to the card for PERFORMING transactions. ATM to AUTHENTICATE the user based on 4 digit PIN associated with the card. User to perform only one transaction at a given time. What are some of the common problems encountered? What happens during transaction timeout? What happens if the money is deducted from the bank account but the user hasn't received it from the machine? Possible TIPS for CONSIDERATION: Divide the problem into different entities like Card, Card READER etc and establish a relationship between each of the entities.

Answer»

ATMs are used for depositing and withdrawing money from customers. It is also useful for checking the account balance.

What are some of the required features?
- Each user should have at least one bank account that is linked to the card for PERFORMING transactions.
- ATM to AUTHENTICATE the user based on 4 digit PIN associated with the card.
- User to perform only one transaction at a given time.
What are some of the common problems encountered?
- What happens during transaction timeout?
- What happens if the money is deducted from the bank account but the user hasn't received it from the machine?
Possible TIPS for CONSIDERATION:
- Divide the problem into different entities like Card, Card READER etc and establish a relationship between each of the entities.

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