Jio Devops Engineer Interview Questions, Process, and Tips

Q1. Explain MessageQueue
Ans. 
MessageQueue is a communication system that allows different software components to communicate by sending messages asynchronously.
• MessageQueue helps in decoupling different components of a system.

• It allows for asynchronous communication between components.

• Messages are stored in a queue until they are processed by the receiving component.

• Examples include RabbitMQ, Apache Kafka, and Amazon SQS.
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Q2. Design of Loadbalancer for Kubernetes
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Designing a Loadbalancer for Kubernetes involves using an Ingress Controller to route traffic to different services.
• Use an Ingress Controller to manage external access to services within a Kubernetes cluster

• Define Ingress resources to specify how incoming requests should be routed

• Consider using a cloud provider's load balancer service for external traffic

• Implement SSL termination and routing rules in the Ingress Contro
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Q1. How do you perform docker migration from one machine to another machine?
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Docker migration from one machine to another involves exporting the container as an image, transferring the image to the new machine, and then importing it.
• Export the Docker container as an image using 'docker save' command

• Transfer the image to the new machine using a secure method like SCP or Docker Hub

• Import the image on the new machine using 'docker load' command

• Run the container on the new machine using 'docker run
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Q2. How will you handle production deployment issues?
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I will troubleshoot the issue, identify the root cause, and work with the team to implement a solution while minimizing downtime.
• Quickly assess the situation and gather relevant information

• Identify the root cause of the deployment issue

• Collaborate with team members to come up with a solution

• Implement the solution while minimizing impact on production environment

• Communicate with stakeholders about the issue and resoluti
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Just gave one peoblem and asked to code it.

Q1. Questions about networking.
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Q2. Different topologies.
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Different network topologies refer to the ways in which devices are connected in a network.
• Bus Topology: all devices are connected to a single cable

• Star Topology: all devices are connected to a central hub

• Ring Topology: each device is connected to two other devices, forming a ring

• Mesh Topology: each device is connected to every other device in the network

• Hybrid Topology: a combination of two or more different topologie
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Q1. Just general HR questions.
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Q1. Regarding AWS networking, Jenkins, Terraform, Linux
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Q2. Write dockerfile to run python script.
Ans. 
Dockerfile to run a Python script
• Use a base Python image as the starting point

• Copy the Python script into the container

• Specify the command to run the Python script
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Q3. Run vs CMD vs ENTRYPOINT.
Ans. 
Run vs CMD vs ENTRYPOINT are Docker instructions used to specify commands to be executed when a container is launched.
• RUN is used to execute commands during the build of the image

• CMD is used to provide default arguments for the entrypoint or to specify the command to run when the container starts

• ENTRYPOINT is used to specify the executable that will run when the container starts, and CMD can be used to provide addition...read more
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Q4. How to upgrade kubernetes cluster version
Ans. 
To upgrade a Kubernetes cluster version, you can use kubeadm tool or manually update each component.
• Use kubeadm tool to upgrade the cluster version

• Check the current version of the cluster using kubectl

• Upgrade the control plane components first, followed by worker nodes

• Ensure compatibility of applications with the new version before upgrading

• Backup important data and configurations before upgrading
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Q5. Terraform file to provision ec2 instance and import existing instance with their configuration
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Use Terraform to provision ec2 instance and import existing instance with their configuration
• Create a Terraform configuration file with necessary resources like aws_instance

• Use the import command to import existing instance with their configuration

• Update the Terraform configuration file with the imported instance details

• Apply the Terraform configuration to provision the ec2 instance
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