Kubernetes Essentials

Overview

Rewards

FAQs

Overview

Container orchestration is a fundamental enabler of digital transformation initiatives. As monolithic applications transition to containerized services, it will be tedious to manage these applications with legacy methods. And hence Kubernetes is one of the eminent container orchestration system, originally designed by Google, that helps you to manage your containerized applications. Kubernetes is now being maintained by the Cloud Native Computing Foundation (CNCF).

Take this assessment to check where do you stand in the Container Orchestration journey and earn Rewards. Click Rewards tab for eligibility requirements.

Read FAQs tab carefully for Instructions before beginning the assessment.

Rewards

NYXPoints are used to generate the Leaderboard (coming soon). They are awarded for achieving a certain score.

200 nyxpoints for a passing score of 80% or more
300 nyxpoints for a perfect score of 100%
Didn’t pass? You still get 30 nyxpoints for attempting the assesment

FAQs

IMPORTANT instructions for taking the Assessment

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General

There are NO pre-requisites to take this assessment. Take this assessment even if you are completely new to Linux.
The assessment is completely FREE.
Preferably take it in a closed book mode.
DO NOT copy/paste, share or upload questions elsewhere.

Eligible Rewards

300 NyxCoins*

* NyxCoins vary on score

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Question 1 of 30

1. Question
Which programming language is used to develop the majority of Kubernetes components?
- C++
- Python
- YAML
- Go
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Question 2 of 30

2. Question
Which all installation components come inbuilt with Kubernetes Orchestrator?
- CRI
- CNI
- CSI
- None of the above
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Question 3 of 30

3. Question
Select a valid command to list all Pods across all Namespaces?
- kubectl get pods -n [namespace_name]
- kubectl get pods
- kubectl get pods -A
- None of the above
Correct

Incorrect
Question 4 of 30

4. Question
What is the purpose of kube-apiserver component in Kubernetes architecture?
- Kube-apiserver is responsible for REST API calls for all operations and communications between components and external user commands
- Kube-apiserver is responsible for Pod creation
- Kube-apiserver is responsible for Auto-scaling and Self-healing
- Kube-apiserver is responsible for communicating with ETCD database only
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Question 5 of 30

5. Question
Which Kubernetes component is not deployed as a Pod during Native Kubernetes Setup?
- Kube-apiserver
- Etcd
- Kube-proxy
- kubelet
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Question 6 of 30

6. Question
How to list metrics (CPU and Memory) for all Pods in the given namespace?
- kubectl top pod
- kubectl top pod ‐‐namespace=[namespace_name]
- kubectl top pod -A
- kubectl top cpu,mem pod
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Question 7 of 30

7. Question
What are the valid taint effects in Kubernetes?
- NoExecute
- NoSchedule
- PreferNoSchedule
- All of the Above
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Question 8 of 30

8. Question
What is a default directory path for Static Pods?
- /etc/kubernetes/manifests
- /etc/kubernetes/pki
- /etc/kubernetes/admin.conf
- /etc/kubernetes/kubelet.conf
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Question 9 of 30

9. Question
Which of the below object is namespace specific object and cannot be used across multiple namespaces?
- PersistentVolumeClaim
- PersistentVolume
- StorageClass
- IngressClass
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Question 10 of 30

10. Question
Select the major Kubernetes offerings in the market?
- Native Kubernetes (OpenSource)
- Enterprise Kubernetes
- Managed Kubernetes
- All of the above
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Question 11 of 30

11. Question
What is the default file which Kubelet refers to load its initial configuration?
- /var/lib/kubelet/config.yaml
- /etc/Kubernetes/kubelet.conf
- /etc/Kubernetes/manifests/etcd.yaml
- /etc/Kubernetes/manifests/kube-apiserver.yaml
Correct

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Question 12 of 30

12. Question
Which Kubernetes object is responsible of ensuring all nodes run a copy of a Pod?
- DaemonSet
- StatefulSet
- ReplicaSet
- None of the Above
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Question 13 of 30

13. Question
Which namespace is used by Kubernetes to deploy its inbuilt components?
- Default
- kube-system
- kube-public
- kube-node-lease
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Question 14 of 30

14. Question
What is the main purpose of kubelet in Kubernetes?
- Software that is used to run containers outside of Pods
- Cluster bootstrap utility
- A utility to interact with the cluster
- Kubelet is a component which runs all on cluster nodes for Pods and Containers management.
Correct

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Question 15 of 30

15. Question
Which Kubernetes component maintains network rules on nodes?
- kube-proxy
- Container Network Interface
- kubelet
- None of the Above
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Question 16 of 30

16. Question
What is the role of a ReplicaSet (RS) in Kubernetes?
- RS guarantee the availability of a specified number of identical Pods
- Store non-confidential data in key-value pairs
- Monitor and respond to environmental latency
- Create and maintain volumes
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Question 17 of 30

17. Question
How to login inside a particular container running inside a pod?
- kubectl exec -it [pod_name]
- kubectl exec -it [pod_name] -c [container_name] ‐‐ /bin/sh
- kubectl exec -it [container_name] ‐‐ /bin/sh
- kubectl exec ‐‐ /bin/sh
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Question 18 of 30

18. Question
Which Kubernetes component is responsible for zero-downtime application upgrades and rollbacks?
- Pods
- Services
- Deployment
- ReplicaSets
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Question 19 of 30

19. Question
Kubeadm reset is used to revert the changes made by?
- Only kubeadm init
- Only kubeadm join
- Both kubeadm init and kubeadm join
- None of the above
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Question 20 of 30

20. Question
Which of the following is not a supported Service type in Kubernetes?
- ClusterIP
- ExternalName
- LoadBalancer
- None of the above
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Question 21 of 30

21. Question
By default, which kubernetes concept restrict application Pods to get deployed on the Master node?
- NodeSelector
- Taint
- Toleration
- Labels and Selectors
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Question 22 of 30

22. Question
What is the main purpose of kubectl utility?
- CLI to interact with the Kubernetes cluster
- CLI to bootstrap Kubernetes cluster
- CLI to start kubelet service
- CLI to reset Kubernetes cluster
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Question 23 of 30

23. Question
How to list all associated labels for a service in a particular namespace?
- Kubectl get svc -n [namespace_name] ‐‐get-labels
- Kubectl get svc -n [namespace_name] ‐‐show-labels
- Kubectl get svc -n [namespace_name] ‐‐list-labels
- Kubectl get svc -n [namespace_name] ‐‐check-labels
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Question 24 of 30

24. Question
Which of the following command removes taint from a worker node?
- kubectl taint node << worker_node >> key=value-
- kubectl untaint node << worker_node >> key=value:effect
- kubectl taint node << worker_node >> key=value:effect-
- kubectl untaint node << worker_node >> key-
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Question 25 of 30

25. Question
What is the preferred way to taking a node out of Kubernetes cluster for maintenance activities?
- kubectl cordon
- kubectl uncordon
- kubectl drain
- None of these
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Incorrect
Question 26 of 30

26. Question
How many maximum number of Pods can be deployed in a single Kubernetes node?
- 120
- 130
- 100
- 110
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Question 27 of 30

27. Question
Which Kubernetes object stores sensitive data and encode it?
- ConfigMaps
- Secrets
- Local variables
- None of the above
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Question 28 of 30

28. Question
How to check the history of deployment with the revisions?
- Kubectl rollout status deployment/deployment_name
- Kubectl rollout view deployment/deployment_name
- Kubectl rollout revision deployment/deployment_name
- Kubectl rollout history deployment/deployment_name
Correct

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Question 29 of 30

29. Question
Which is a correct command to generate a skeleton yaml file for a deployment object?
- Kubectl generate deployment ‐‐image=yogeshraheja/devopsinaction:v1 ‐‐dry-run=client -o yaml > sampledeployment.yaml
- Kubectl create deployment ‐‐image=yogeshraheja/devopsinaction:v1 ‐‐dry-run=client -o yaml > sampledeployment.yaml
- Kubectl run deployment ‐‐image=yogeshraheja/devopsinaction:v1 ‐‐dry-run=client -o yaml > sampledeployment.yaml
- Its not possible to generate a yaml skeleton for deployment object
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Question 30 of 30

30. Question
Select a correct command to backup ectd database at location /tmp/thinknyx-backup.db?
- ETCDCTL_API=3 etcdctl snapshot save /tmp/thinknyx-backup.db
- ETCDCTL_API=3 etcdctl snapshot status /tmp/thinknyx-backup.db
- ETCDCTL_API=3 etcdctl snapshot restore /tmp/thinknyx-backup.db
- ETCDCTL_API=3 etcdctl snapshot copy /tmp/thinknyx-backup.db
Correct

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