Payment integration architecture in HLD - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the primary role of a Payment Gateway in payment integration architecture?

A Payment Gateway securely processes payment information between the customer, merchant, and payment networks. It acts like a digital cashier that authorizes and routes transactions.

beginner

Why is PCI DSS compliance important in payment integration?

PCI DSS (Payment Card Industry Data Security Standard) ensures that payment data is handled securely to protect cardholder information and prevent fraud.

intermediate

What is the purpose of tokenization in payment systems?

Tokenization replaces sensitive payment data with a unique token that has no exploitable meaning, reducing risk if data is intercepted or breached.

intermediate

How does asynchronous processing benefit payment systems?

Asynchronous processing allows the system to handle payment requests without waiting for immediate confirmation, improving scalability and user experience.

intermediate

What role does a fraud detection service play in payment integration?

Fraud detection services analyze transactions in real-time to identify suspicious behavior and prevent fraudulent payments before completion.

Which component is responsible for securely transmitting payment data from the customer to the payment processor?

A User Interface

B Merchant Database

C Payment Gateway

D Inventory System

The Payment Gateway securely transmits payment data between the customer and payment processor.

What does PCI DSS compliance ensure in payment systems?

A Faster transaction processing

B Better user interface design

C Lower transaction fees

D Secure handling of cardholder data

PCI DSS ensures secure handling of cardholder data to prevent fraud.

Tokenization in payment systems is used to:

A Replace sensitive data with a non-sensitive token

B Encrypt the entire payment database

C Speed up network communication

D Authenticate users

Tokenization replaces sensitive payment data with tokens to reduce risk.

Which of the following improves scalability in payment processing?

A Manual transaction approval

B Asynchronous processing

C Synchronous blocking calls

D Single-threaded processing

Asynchronous processing allows handling many requests without waiting, improving scalability.

Fraud detection services in payment systems primarily:

A Identify suspicious transactions in real-time

B Store payment history

C Calculate taxes

D Manage inventory levels

Fraud detection services analyze transactions to prevent fraud.

Explain the key components and flow of a typical payment integration architecture.

Think about how money moves securely from buyer to seller.

Describe how security is maintained in payment integration systems.

Focus on protecting cardholder data and preventing fraud.