Given the following code snippet, what will be the total quantity of products in the cart after adding 3 units of Product A and 2 units of Product B?

medium📝 Analysis Q4 of 15

LLD - Design — Online Shopping Cart

cart.addProduct(productA, 3);
cart.addProduct(productB, 2);
cart.addProduct(productA, 1);

Step-by-Step Solution

Solution:

Step 1: Calculate total quantity for Product A
Product A is added twice: 3 + 1 = 4 units.
Step 2: Calculate total quantity for Product B and sum all
Product B is added once with 2 units. Total quantity = 4 + 2 = 6.
Final Answer:
Total quantity in cart is 6 -> Option B
Quick Check:
Total quantity = 6 [OK]

Quick Trick: Sum quantities of same product added multiple times [OK]

Common Mistakes:

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