Which two statements are correct about containers? (Choose two.)
Answer(s): C,D
Containers are lightweight because they don't need the extra load of a hypervisor, but run directly within the host machine's kernel. This means they start up almost instantly and use less RAM. Images are constructed from layered filesystems and share common files, making disk usage and image downloads much more efficient. Containers are isolated from each other and the host system. They have their own filesystem and networking, and can be constrained to not allow root access outside the container. They run on top of a host operating system.
What are two Kubernetes objects? (Choose two.)
In Kubernetes, a Pod is the smallest and simplest unit in the Kubernetes object model that you create or deploy. A Pod represents processes running on your cluster. A Service in Kubernetes is an abstraction which defines a logical set of Pods and a policy by which to access them.
Which two statements are correct about an overlay network? (Choose two.)
An overlay network is a virtual network that is built on top of another network. Nodes in the overlay network are connected by virtual or logical links, each of which corresponds to a path, perhaps through many physical links, in the underlying network. For example, distributed systems such as peer-to-peer networks and client-server applications often overlay their own network connections over the physical network connections provided by the Internet
Your company has a Web app hosted in Kubernetes with a fluctuating number of pods.In this scenario, which Kubernetes service type would provide equal access to all nodes using a single URL?
Answer(s): C
The LoadBalancer service type in Kubernetes exposes the service externally using a cloud provider's load balancer. NodePort and ClusterIP services, to which the external load balancer routes, are automatically created
Which two Linux commands would you use to show the amount of RAM in your system? (Choose two.)
Answer(s): B,C
he free -h command in Linux displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel. The cat /proc/meminfo command displays real-time information about the system's memory usage as well as the buffers and shared memory used by the kernel1
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