You are designing a DDD model for an online store. Which of the following best represents an Aggregate?

hard📝 Trade-off Q15 of 15

LLD - Advanced LLD Concepts

AAn Order object that contains multiple OrderItems and enforces business rules

BA single Product object with price and description

CA database table storing customer addresses

DA utility service that calculates discounts

Step-by-Step Solution

Solution:

Step 1: Understand Aggregate in DDD
An Aggregate is a cluster of related objects treated as a single unit with a root entity controlling consistency.
Step 2: Match options with Aggregate concept
An Order object that contains multiple OrderItems and enforces business rules describes an Order with multiple OrderItems and business rules, fitting Aggregate definition.
Final Answer:
An Order object containing multiple OrderItems and enforcing business rules -> Option A
Quick Check:
Aggregate = root entity + related objects [OK]

Quick Trick: Aggregate = root entity plus related objects as one unit [OK]

Common Mistakes:

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