Spring Cloud Quality Control & Assurance 2

Question 1

Which Spring Cloud Contract feature allows a consumer team to define a contract before the producer API is implemented?

Accepted Answer

Consumer-Driven Contract (CDC)

Answer

Consumer-Driven Contracts let the consumer team write the contract stub first, enabling parallel development before the producer is ready.

Question 2

What does Spring Cloud Sleuth use to correlate log entries across multiple microservices?

Accepted Answer

Trace ID and Span ID

Answer

Sleuth propagates a Trace ID (for the full request chain) and Span ID (for individual service hops) through HTTP headers and messaging.

Question 3

In Spring Cloud Gateway, which filter type executes BEFORE the proxied request is sent to the downstream service?

Accepted Answer

Pre filter

Answer

Pre filters run before the request is forwarded, making them ideal for authentication, rate-limiting, and header manipulation.

Question 4

When using Spring Cloud Bus to broadcast configuration changes, which message broker is commonly used?

Accepted Answer

RabbitMQ or Apache Kafka

Answer

Spring Cloud Bus officially supports RabbitMQ and Kafka as message brokers for propagating configuration refresh events.

Question 5

Which assertion library is recommended for writing readable Spring Boot integration test assertions?

Accepted Answer

AssertJ

Answer

AssertJ provides a fluent, IDE-friendly API and is the preferred assertion library in Spring Boot's own test documentation.

Spring Cloud Practice Test