Verizon Senior Devops Engineer Interview Questions and Answers

Basic dsa and scalable scripting

Q1. Technical interview with the manager, just a flowy conversation
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Case study is quite practical based scenario

Q1. 1.Cannot mention interview question, but I was more on more hands on and production grade scenario.
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Q2. Scalibloty related to question
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Q1. What is Object-Oriented Programming (OOP), and can you explain its fundamental concepts?
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OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOP focuses on creating objects that interact with each other to solve complex problems.

• Fundamental concepts include classes, objects, inheritance, encapsulation, and polymorphism.

• Classes are blueprints for creating objects, while objects are instances of classes.

• Inheritance all...read more
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Q2. What is the definition of an array, and what are the different types of arrays?
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An array is a data structure that stores a collection of elements of the same type. There are different types of arrays such as one-dimensional, multi-dimensional, and associative arrays.
• One-dimensional array: Stores elements in a single row or column.

• Multi-dimensional array: Stores elements in multiple rows and columns.

• Associative array: Uses key-value pairs to store elements.

• Example: ['apple', 'banana', 'orange']
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Q3. What is the clr
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CLR stands for Common Language Runtime, a virtual machine component of the .NET framework responsible for managing code execution.
• CLR provides services such as memory management, exception handling, and security.

• It compiles code into Intermediate Language (IL) and then translates it into machine code at runtime.

• CLR allows for language interoperability within the .NET framework, enabling different languages to work toge
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The content is based on HTML, Windows, and ADO.NET.

Q1. What motivates you to pursue this job?
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I am motivated to pursue a career as a Customer Care Executive because I enjoy helping others and providing excellent service.
• I have a passion for assisting customers and resolving their issues

• I thrive in a fast-paced environment where I can use my communication skills effectively

• I find satisfaction in ensuring customer satisfaction and building positive relationships

• I believe in the importance of delivering exceptiona...read more
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Q2. What is your expected salary?
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My expected salary is based on my experience, skills, and the market rate for web developers.
• I have researched the average salary for web developers in this location.

• I am open to negotiation based on the overall compensation package offered.

• I am looking for a salary that reflects my expertise and contributions to the team.
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Q1. Explain MessageQueue
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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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Q1. Regarding AWS networking, Jenkins, Terraform, Linux
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Q2. Write dockerfile to run python script.
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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.
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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
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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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Q1. Explain about pipeline What is provisoner in terraform etc
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A pipeline is a series of automated steps that allow for the continuous integration and delivery of software.
• A pipeline typically includes stages such as building, testing, and deploying code.

• Tools like Jenkins, GitLab CI/CD, and AWS CodePipeline are commonly used for creating pipelines.

• Pipelines help in automating the software development process and ensuring faster delivery of updates.

• Provisioner in Terraform is a to...read more
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Q2. Cicd process explained
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CI/CD process automates the building, testing, and deployment of code changes.
• Continuous Integration (CI) involves automatically building and testing code changes frequently.

• Continuous Deployment (CD) involves automatically deploying code changes to production.

• CI/CD pipelines use tools like Jenkins, GitLab CI/CD, or CircleCI to automate the process.

• Automated testing is a key component of CI/CD to ensure code quality.

• CI...read more
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