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Which of the following is the correct sequence of steps in a typical payment processing flow?

easy🧠 Conceptual Q12 of Q15
LLD - Design — Parking Lot System
Which of the following is the correct sequence of steps in a typical payment processing flow?
ANotify user -> Record transaction -> Process payment -> Validate payment details
BRecord transaction -> Validate payment details -> Notify user -> Process payment
CValidate payment details -> Process payment -> Record transaction -> Notify user
DProcess payment -> Notify user -> Validate payment details -> Record transaction
Step-by-Step Solution
Solution:

  1. Step 1: Identify logical payment flow order

    First, payment details must be validated to ensure correctness.

  2. Step 2: Follow with processing, recording, and notifying

    After validation, payment is processed, transaction recorded, then user notified.

  3. Final Answer:

    Validate payment details -> Process payment -> Record transaction -> Notify user -> Option C

  4. Quick Check:

    Payment flow = Validate -> Process -> Record -> Notify [OK]
Quick Trick: Payment flows from validation to processing, then record and notify [OK]
Common Mistakes:
MISTAKES
  • Not validating before processing
  • Not recording transaction before notifying
  • Mixing notification before processing

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