07/06/2026
Interviewer asked:
“You and your friend opened Amazon at the same time…
Why did one see ₹999 and the other ₹1199?” 🤯
Answer:
Price isn’t always stored as a single number.
Modern systems often calculate the final price in real time using a Pricing Engine.
Inputs can include:
📍 Location
⏰ Time
🔥 Demand
🎁 Coupons
📦 Inventory
👤 User context
Formula (simplified):
Base Price
+ Demand Adjustment
− Discounts
± Business Rules
Result:
Same product.
Different users.
Different final price.
This is called Dynamic Pricing ⚡
Now tell me 👇
Fair system or unfair?
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