Kubernetes Basics Quiz

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Test your fundamental Kubernetes knowledge with this quick quiz.

Instructions:

• Select the best answer for each question.
• Your score will be shown at the end.
• Aim for 100% to prove you are ready for the next level!

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What is the smallest deployable unit in Kubernetes?

Pod

Container

Node

Service

A Pod is the smallest and simplest Kubernetes object. A Pod represents a single instance of a running process in your cluster and can contain one or more containers.

#

Which command lists all pods in the default namespace?

kubectl get pods

kubectl list pods

kubectl show pods

kubectl run pods

kubectl get pods retrieves a list of all pods in the current namespace.

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What is a Kubernetes Service?

An abstraction that exposes a set of Pods as a network service

A tool to build container images

A storage volume

A background process on the node

A Service identifies a set of Pods using selectors and defines a logical set of Pods and a policy by which to access them.

#

Which object is used to manage stateless applications and ensures a specified number of replicas are running?

Deployment

StatefulSet

DaemonSet

Job

A Deployment provides declarative updates for Pods and ReplicaSets. It is commonly used for stateless applications.

#

Which command applies a configuration file to a cluster?

kubectl apply -f filename.yaml

kubectl create -f filename.yaml

kubectl update -f filename.yaml

kubectl run -f filename.yaml

kubectl apply -f manages applications through files defining Kubernetes resources. It creates and updates resources declaratively.

#

What is a Namespace in Kubernetes?

A mechanism to isolate resources within a single cluster

A physical server in the cluster

A type of container runtime

A network policy

Namespaces provide a scope for names, intended for isolate resources between multiple teams or projects.

#

Which component controls the Kubernetes cluster?

Control Plane (Master Node)

Worker Node

Kubelet

Kube-proxy

The Control Plane (Master Node) manages the worker nodes and the Pods in the cluster. It makes global decisions (scheduling) and detects/responds to cluster events.

#

What is a Node in Kubernetes?

A worker machine (VM or physical) that runs containerized applications

A container image

A load balancer

A database service

A Node is a worker machine in Kubernetes, managed by the Control Plane.

#

Which command is used to view logs of a pod?

kubectl logs pod_name

kubectl view logs pod_name

kubectl show logs pod_name

kubectl get logs pod_name

kubectl logs prints the logs for a container in a pod.

#

What is Kubelet?

An agent that runs on each node and ensures containers are running in a Pod

The command line tool for Kubernetes

The key-value store for cluster data

The network proxy running on each node

Kubelet is the "node agent" that runs on each node to manage Pods and containers.

#

Which command gives detailed information about a specific resource?

kubectl describe

kubectl detail

kubectl info

kubectl inspect

kubectl describe shows detailed information about a resource, including events and status conditions.

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What happens if a Pod crashes in a Deployment?

The Deployment Controller automatically creates a new Pod to replace it

The application stops working permanently

The entire Node is restarted

Administrative intervention is required immediately

Kubernetes Deployments (via ReplicaSets) permit self-healing. If a Pod crashes, it is replaced to maintain the desired replica count.

#

Which command is used to execute a command inside a specific container in a Pod?

kubectl exec

kubectl run

kubectl enter

kubectl ssh

kubectl exec allows you to execute a command directly inside a running container (e.g., kubectl exec -it <pod> -- /bin/bash).

#

What does the "Pending" status of a Pod mean?

The Pod has been accepted by the system but hasn't been scheduled to a node yet

The Pod is running

The Pod has failed

The Pod is being deleted

Pending means the Pod is created in the API Server but not yet scheduled to a Node (e.g., waiting for resources or matching node selectors).

#

What is a ReplicaSet?

Ensures a specified number of Pod replicas are running at any given time

A tool to replicate databases

A set of configuration files

A network proxy

A ReplicaSet guarantees the availability of a specified number of identical Pods.

#

Which command deletes a resource defined in a YAML file?

kubectl delete -f filename.yaml

kubectl remove -f filename.yaml

kubectl destroy -f filename.yaml

kubectl erase -f filename.yaml

kubectl delete -f removes the resources defined in the specified configuration file.

#

usage of kubectl port-forward?

Forward one or more local ports to a pod

Opens a port on the firewall

Configures a Load Balancer

SSH into the node

kubectl port-forward allows you to access a Pod's internal port from your local machine (localhost) securely.

#

What is the default restart policy for a Pod?

Always

OnFailure

Never

UnlessStopped

The default RestartPolicy is Always, meaning the container is restarted if it stops, regardless of the exit code.

#

Which component stores the cluster data (key-value store)?

etcd

API Server

Scheduler

Controller Manager

etcd is the backing store for all cluster data.

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How do you quickly check the cluster info and master URL?

kubectl cluster-info

kubectl info

kubectl get cluster

kubectl master

kubectl cluster-info displays addresses of the master and services.

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