1. True – Kubernetes allows different runtimes for containers.
2. False – Due to the independent size of microservices, cloud-native applications are simpler than monolithic applications but difficult to test. 
3. True – Without tools, it is difficult to diagnose cloud-native applications.
4. True – Apache Mesos does much more than Kubernetes, but Kubernetes excels in container orchestration compared to Mesos.
5. True – Due to its large community and support for a variety of features, Kubernetes has become the de-facto container orchestration system.