Here are brief answers to designing various cloud-native systems:

1. Design a cloud-native CI/CD pipeline.
Use a containerization tool like Docker, a Kubernetes cluster for automation, and a CI/CD tool like Jenkins or GitLab CI/CD for workflow management.

2. Design a serverless event-driven architecture.
Use a cloud provider's serverless functions (e.g., AWS Lambda), event-driven triggers (e.g., API Gateway), and a managed event bus (e.g., Amazon EventBridge).

3. Design a cloud-based data warehousing system.
Use a columnar storage database (e.g., Amazon Redshift), a data ingestion tool (e.g., AWS Glue), and a business intelligence platform (e.g., Tableau) for data analysis.

4. Design a real-time data processing system with Apache Kafka.
Use Kafka for event-driven data processing, Apache Spark for stream processing, and a NoSQL database (e.g., Apache Cassandra) for data storage.

5. Design a cloud-native API gateway.
Use a cloud provider's API gateway (e.g., AWS API Gateway), a service mesh (e.g., Istio), and a containerization tool (e.g., Docker) for microservices management.

6. Design a cloud-based machine learning platform.
Use a cloud provider's machine learning service (e.g., AWS SageMaker), a notebook environment (e.g., Jupyter Notebook), and a version control system (e.g., Git) for model management.

7. Design a cloud-native messaging system.
Use a cloud provider's message queue (e.g., Amazon SQS), a message broker (e.g., Apache RabbitMQ), and a containerization tool (e.g., Docker) for microservices communication.

8. Design a cloud-based identity and access management system.
Use a cloud provider's IAM service (e.g., AWS IAM), a single sign-on solution (e.g., Okta), and a multi-factor authentication tool (e.g., Google Authenticator) for secure access.

9. Design a cloud-native logging and monitoring system.
Use a cloud provider's logging service (e.g., AWS CloudWatch Logs), a monitoring tool (e.g., Prometheus), and a visualization platform (e.g., Grafana) for system insights.

10. Design a cloud-based disaster recovery system.
Use a cloud provider's disaster recovery service (e.g., AWS Disaster Recovery), a backup and restore tool (e.g., AWS Backup), and a failover solution (e.g., AWS Route 53) for business continuity.

11. Design a cloud-native security information and event management system.
Use a cloud provider's SIEM service (e.g., AWS Security Hub), a threat intelligence platform (e.g., Anomali), and a security orchestration tool (e.g., Palo Alto Networks) for threat detection and response.