Given a BFF that calls User Service and Product Service, what is the expected output if User Service returns user data and Product Service returns an error?

medium📝 Analysis Q4 of 15

Microservices - Advanced Patterns

ABFF returns only product data ignoring user data.

BBFF crashes and returns no data.

CBFF returns combined user data and product error to the frontend.

DBFF returns empty response.

Step-by-Step Solution

Solution:

Step 1: Understand BFF error handling
BFF typically aggregates data and handles partial failures gracefully, returning available data with error info.
Step 2: Analyze given scenario
User Service returns data, Product Service returns error. BFF should return user data plus product error to frontend.
Final Answer:
BFF returns combined user data and product error to the frontend. -> Option C
Quick Check:
BFF handles partial errors = combined response [OK]

Quick Trick: BFF aggregates data, handles partial errors [OK]

Common Mistakes:

Assuming BFF crashes on any microservice error
Ignoring partial data and returning empty
Returning only error without available data

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More Microservices Quizzes

Given a BFF that calls User Service and Product Service, what is the expected output if User Service returns user data and Product Service returns an error?

Step 1: Understand BFF error handling

Step 2: Analyze given scenario

Final Answer:

Quick Check:

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