Kubernetes Container Orchestration Cloud Native Patterns 4

Question 1

The CQRS (Command Query Responsibility Segregation) pattern separates:

Accepted Answer

Write operations (commands) from read operations (queries) into different models/services

Answer

CQRS uses separate models for updating data (commands) and reading data (queries), allowing each side to scale and optimize independently.

Question 2

In the Event Sourcing pattern, what is stored as the primary source of truth?

Accepted Answer

An immutable log of all state-changing events in order

Answer

Event Sourcing stores every state change as an immutable event; the current state is derived by replaying the event log.

Question 3

Which cloud native pattern coordinates a distributed transaction across multiple microservices without using a two-phase commit?

Accepted Answer

Saga

Answer

The Saga pattern manages distributed transactions by chaining local transactions with compensating transactions on failure, avoiding distributed locks.

Question 4

The 'Transactional Outbox' pattern solves which specific problem in event-driven microservices?

Accepted Answer

Atomically saving a database record and publishing an event without a distributed transaction

Answer

The Transactional Outbox pattern writes the event to an outbox table in the same DB transaction as the business record, then a separate process publishes it.

Question 5

In Kubernetes, the 'GitOps' pattern requires that the desired cluster state is:

Accepted Answer

Stored declaratively in a Git repository and continuously reconciled by an operator

Answer

GitOps uses a Git repo as the single source of truth for declarative infrastructure, with operators like Argo CD or Flux continuously reconciling the cluster state.

Kubernetes Container Orchestration Practice Test

Kubernetes Container Orchestration Practice Test

Kubernetes Container Orchestration Cloud Native Patterns 4