Tech Mahindra AWS Cloud and DevOps Engineer Interview Questions and Answers

Q1. What technology have you used
Ans. 
I have experience with a variety of technologies including AWS, Docker, Kubernetes, Jenkins, Terraform, and Ansible.
• AWS

• Docker

• Kubernetes

• Jenkins

• Terraform

• Ansible
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Q1. How can you perform rolling updates and rollbacks of applications in Kubernetes?
Ans. 
Rolling updates and rollbacks in Kubernetes can be performed using deployment objects and their configurations.
• Use Kubernetes deployment objects to manage application updates.

• Specify the desired number of replicas and update strategy in the deployment configuration.

• To perform a rolling update, change the image version in the deployment configuration and apply the changes.

• Kubernetes will gradually update pods to the new...read more
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Q2. What is the purpose of Helm in Kubernetes, and how does it simplify application deployment and management
Ans. 
Helm is a package manager for Kubernetes that simplifies application deployment and management.
• Helm allows users to define, install, and upgrade complex Kubernetes applications with ease using charts.

• It helps in managing dependencies, configurations, and versions of applications in Kubernetes.

• Helm enables sharing of applications through public or private repositories, promoting reusability and collaboration.

• It provides...read more
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Q3. How would you troubleshoot a Pod that is not running as expected in a Kubernetes cluster?
Ans. 
To troubleshoot a Pod not running in a Kubernetes cluster, check logs, describe Pod, check resource limits, verify network connectivity, and restart Pod.
• Check the logs of the Pod to identify any error messages or issues

• Describe the Pod to get more information about its status, events, and configuration

• Check the resource limits and requests of the Pod to ensure it has enough resources to run

• Verify network connectivity w...read more
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Q4. What are DaemonSets in Kubernetes, and when might you use them
Ans. 
DaemonSets in Kubernetes ensure that a copy of a pod is running on all or a subset of nodes in a cluster
• DaemonSets are used when you need to run a single pod on all nodes in a cluster, such as logging or monitoring agents

• They are also useful for running pods that provide node-level services, like storage or networking

• DaemonSets can be used to ensure that a specific pod is always running on specific nodes, regardless of
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Q5. What is a Persistent Volume (PV) and a Persistent Volume Claim (PVC) in Kubernetes, and how do they relate to stateful applications?
Ans. 
PV and PVC in Kubernetes are used to provide persistent storage for stateful applications.
• Persistent Volume (PV) in Kubernetes is a piece of storage in the cluster that has been provisioned by an administrator.

• Persistent Volume Claim (PVC) is a request for storage by a user or pod in the cluster.

• PVs and PVCs decouple storage from the pod, allowing for easier management and scaling of stateful applications.

• PVs can be dy...read more
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Q1. NO ROUND CONDUCTED SIMPLY WASTED 6 MONTHS
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About aws and devops

Q1. Ask me basic questions on aws
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Q1. What is the agile methodology?
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Q2. What is the waterfall model in software development?
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Q1. Ci cd pipeline and variables?
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Q2. Blue green and canary deployment kubernetes
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Q3. Security in Terraform
Ans. 
Security in Terraform involves managing sensitive data, implementing access controls, and using secure communication channels.
• Use Terraform's sensitive data handling features like sensitive variables and sensitive outputs to protect sensitive information.

• Implement access controls using Terraform's built-in features like IAM policies, resource-level permissions, and secure storage backends.

• Use secure communication chann...read more
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Q4. Helm chart and how to use it?
Ans. 
Helm is a package manager for Kubernetes that simplifies the deployment and management of applications.
• Helm charts are packages of pre-configured Kubernetes resources that can be easily deployed using Helm.

• Helm charts are written in YAML and can include templates for Kubernetes manifests.

• Helm allows for easy versioning, sharing, and management of Kubernetes applications.

• To use Helm, you need to install the Helm client ...read more
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Q5. Branching strategies
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Q1. S3 storwge class
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Q2. Day to day activities in current role
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Q3. Amazon vpc advantages vpc peering
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Q4. Jenkins pipeline building
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Q5. Terraform validate command
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Q1. What is Terraform
Ans. 
Terraform is an open-source infrastructure as code software tool created by HashiCorp.
• Terraform allows users to define and provision infrastructure using a declarative configuration language.

• It supports multiple cloud providers such as AWS, Azure, Google Cloud, and more.

• Terraform uses 'terraform plan' to create an execution plan and 'terraform apply' to apply the changes.

• It helps in automating the creation, modificatio...read more
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Q2. What is Azure DevOps
Ans. 
Azure DevOps is a set of development tools provided by Microsoft to help teams collaborate and deliver high-quality software.
• Azure DevOps includes services such as Azure Repos, Azure Pipelines, Azure Boards, Azure Artifacts, and Azure Test Plans.

• It allows for version control, continuous integration/continuous deployment (CI/CD), project management, and testing.

• Teams can plan, build, test, and deploy applications using ...read more
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Q3. What is CI/CD pipelines
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CI/CD pipelines automate the process of building, testing, and deploying code changes.
• CI/CD stands for Continuous Integration/Continuous Deployment

• Automates the process of integrating code changes into a shared repository and deploying them to production

• Helps in detecting and fixing integration errors early in the development process

• Enables faster delivery of software updates and improvements

• Popular tools for CI/CD pip...read more
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Q4. What is Docker and Kubernetes
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Docker is a platform for developing, shipping, and running applications in containers. Kubernetes is a container orchestration tool for managing containerized applications across a cluster of nodes.
• Docker allows developers to package applications and their dependencies into containers for easy deployment.

• Kubernetes automates the deployment, scaling, and management of containerized applications.

• Docker containers are lig...read more
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