Module 2

Question 1

Kubernetes

Answer 1

a portable, extensible, open-source platform for managing containerized workloads and services that facilitates both declarative configuration and automation. It has a large, rapidly growing ecosystem. Kubernetes services, support, and tools are widely available.”

Question 2

Cluster

Answer 2

A deployment of Kubernetes is called a cluster.

Question 3

What are Kubernetes Objects?

Answer 3

Kubernetes objects are persistent entities in Kubernetes. In this way, Kubernetes objects define the state of thecluster. By creating an object, users cantell Kubernetes that theyexpect that object to exist. The system is then responsible for ensuring that that object does in fact exist.

Question 4

Namespaces

Answer 4

With namespaces, userscan make one cluster appear to be several distinct clusters in order for multiple people to share the cluster. A cluster will automatically have several namespaces created. Namespaces can be used to provide logical separation of a cluster into virtual clusters.

Question 5

Labels

Answer 5

Key/value pairs that can be attached to objects in order to identify those objects.

Question 6

Selectors

Answer 6

Used by Kubernetes controllers to determine which set of objects ought to be controlled.

Question 7

Pod

Answer 7

Simplest unit in kubernetes,
Represents processes running in thecluster.
Encapsulates a container (or sometimes multiple).

Question 8

Replicaset

Answer 8

A ReplicaSet maintains a set of Identical Pods.

Question 9

Kubectl CLI

Answer 9

Kubectl CLI is the user interface.

Question 10

Resizing a VM to add additional capacity is part of which of the following?

Answer 10

Vertical scaling

Question 11

Adding more VMs to a cluster to increase capacity is which of these?

Answer 11

Scale out

Question 12

Replicating a Pod serves to scale an application in which of the following ways?

Answer 12

Horizontally

Question 13

Which of the following statements describes Kubernetes?

Answer 13

A.Open source software
B.Container orchestration platform
C.A tool that facilitates declarative management

Question 14

Which of the following components is part of the Kubernetes control plane?

Answer 14

etcd

Question 15

Which of the following is considered a Kubernetes object?

Answer 15

Namespace

Question 16

Which Kubernetes object represents a single instance of processes running in a container?

Answer 16

Pod

Question 17

What does “create” do in this command?kubectl create –f nginx.yaml

Answer 17

It creates an object using the details in the nginx.yaml file.

Question 18

What are some of the benefits of an IBM Cloud Kubernetes service? Select all that apply.

Answer 18

A.Image security compliance with Vulnerability Advisor
B.Support for multizone clusters.
C.Continuous monitoring of the cluster health.
D.Highly available masters.

Question 19

Each node is made up of which of the following pairs?

Answer 19

C.kube-proxy and kubelet