Manage Inventory Systems with OO Design | Dataford Interview Questions

Tell me about how you would manage inventory systems or lookups using object-oriented principles rather than pure algorithmic optimization, as you would at Stripe.

Implement manage_inventory(operations), using an internal Inventory class to encapsulate stock state and expose clear methods for adding, removing, and looking up SKU quantities. Each operation is a dictionary with action, sku, and optionally quantity. Return one result per operation: True for successful additions or removals, and the integer quantity for lookups. Removing more stock than available is invalid.

Constraints

0 <= operations.length <= 100
Each operation action is one of: add, remove, lookup
Each SKU is a non-empty string
Add and remove quantities are positive integers
A remove operation never exceeds the current quantity for its SKU

Function Signature

def manage_inventory(operations):

Your question is Manage Inventory Systems with OO Design. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Tell me about how you would manage inventory systems or lookups using object-oriented principles rather than pure algorithmic optimization, as you would at Stripe.

Constraints

0 <= operations.length <= 100
Each operation action is one of: add, remove, lookup
Each SKU is a non-empty string
Add and remove quantities are positive integers
A remove operation never exceeds the current quantity for its SKU

Function Signature

def manage_inventory(operations):

Your question is Manage Inventory Systems with OO Design. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.