Microservices Microservices 3

Question 1

The Saga pattern is used primarily to manage:

Accepted Answer

Distributed transactions across multiple services without a global lock

Answer

Sagas coordinate distributed transactions via a sequence of local transactions and compensations.

Question 2

In a choreography-based saga, services coordinate by:

Accepted Answer

Publishing and reacting to events without a central orchestrator

Answer

Choreography relies on services emitting and reacting to events, with no central coordinator.

Question 3

What is a compensating transaction in a saga?

Accepted Answer

An action that undoes the effect of a previously completed step on failure

Answer

Compensating transactions semantically reverse prior steps when a later step fails.

Question 4

The Strangler Fig pattern is used to:

Accepted Answer

Incrementally migrate a monolith to microservices by gradually replacing functionality

Answer

The Strangler Fig pattern gradually routes functionality away from a monolith to new services.

Question 5

What problem does the CQRS pattern address?

Accepted Answer

Separating read and write models for scalability and clarity

Answer

CQRS separates command (write) and query (read) responsibilities into different models.

Microservices Practice Test