Mavenir Systems Devops Engineer Interview Questions and Answers

Q1. Introduce yourself
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I am a DevOps Engineer with 5 years of experience in automating, optimizing, and monitoring software development processes.
• 5 years of experience in DevOps

• Proficient in automating software development processes

• Skilled in optimizing and monitoring systems

• Strong knowledge of CI/CD pipelines

• Experience with tools like Jenkins, Docker, Kubernetes
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Q2. Write a CI/CD Pipeline code for a 3 tier application
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A CI/CD Pipeline code for a 3 tier application
• Use a version control system like Git to store the application code

• Set up a CI tool like Jenkins to automate the build process

• Define stages in the pipeline for building, testing, and deploying each tier of the application

• Leverage tools like Docker for containerization and Kubernetes for orchestration

• Implement automated testing at each stage to ensure code quality and reliab
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Q3. Difference between NSG and ASG
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NSG stands for Network Security Group and is used to control inbound and outbound traffic to Azure resources. ASG stands for Availability Set Group and is used to ensure high availability of virtual machines.
• NSG controls traffic by setting rules for inbound and outbound traffic based on source and destination IP addresses, ports, and protocols.

• ASG groups virtual machines together to ensure high availability by distribu...read more
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Q1. Architecture about project
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Q2. Container creation in terraform
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Container creation in terraform involves defining a container resource in a terraform configuration file.
• Define a container resource in the terraform configuration file using the 'docker_container' or 'container' provider.

• Specify the image, name, ports, and other necessary configurations for the container.

• Run 'terraform init' and 'terraform apply' to create the container based on the defined configuration.
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Q1. Docker Kubernetes Terraform
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Q1. In k8s and onpremises
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Kubernetes (k8s) is a container orchestration platform for managing containerized applications, while on-premises refers to running applications on local servers.
• Kubernetes (k8s) is used for automating deployment, scaling, and management of containerized applications.

• On-premises refers to running applications on local servers within an organization's own data center.

• Kubernetes can be deployed both on-premises and in th...read more
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Hacker rank coding exercise

Q1. Why DevOps is needed in an organisation?
Ans. 
DevOps is needed in an organization to improve collaboration between development and operations teams, increase efficiency, and deliver high-quality software faster.
• Improves collaboration between development and operations teams

• Increases efficiency in software development and deployment processes

• Helps in delivering high-quality software faster

• Automates repetitive tasks to reduce manual errors

• Facilitates continuous inte...read more
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Q2. What is the difference between ADD vs COPY?
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ADD and COPY are Dockerfile instructions used to copy files and directories into a Docker image, but they have some key differences.
• ADD allows for URLs and automatically extracts compressed files, while COPY only works with local files

• COPY is recommended for copying local files and directories into an image, while ADD is more versatile but can be less predictable

• ADD can be used to download files from the internet and a
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Q1. Questions were around Kubernetes deployments, autoscaling, networking, Terraform etc
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Q1. More on the problem solving questions
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Q1. About package and roles
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Q1. How to ensure high available of eks cluster.
Ans. 
To ensure high availability of EKS cluster, utilize multiple availability zones, implement auto-scaling, use managed node groups, and set up monitoring and alerts.
• Utilize multiple availability zones to distribute workload and ensure redundancy.

• Implement auto-scaling to automatically adjust resources based on demand.

• Use managed node groups to simplify node management and ensure high availability.

• Set up monitoring and al...read more
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Q2. What are liveness and readiness probe
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Liveness and readiness probes are used in Kubernetes to check the health of containers.
• Liveness probe checks if a container is running and healthy. If it fails, Kubernetes restarts the container.

• Readiness probe checks if a container is ready to serve traffic. If it fails, Kubernetes stops sending traffic to the container.

• Probes are configured in the pod's YAML file using the 'livenessProbe' and 'readinessProbe' fields.

• ...read more
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