Walmart Senior DevOps Engineer Interview Questions and Experience

Walmart Senior DevOps Engineer Interview Questions and Experience

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• Register for DevOps Batch 11
• Previous Batch Placements

You Should Know:

1. Daily Responsibilities of a DevOps Engineer:

• Automating CI/CD pipelines.
• Managing infrastructure as code (IaC).
• Monitoring and logging using tools like Prometheus, Grafana, and ELK Stack.
• Ensuring security and compliance in the deployment process.

2. CI/CD Workflow:

• Jenkins Pipeline Script Example:

  pipeline {
  agent any
  stages {
  stage('Build') {
  steps {
  sh 'mvn clean package'
  }
  }
  stage('Test') {
  steps {
  sh 'mvn test'
  }
  }
  stage('Deploy') {
  steps {
  sh 'mvn deploy'
  }
  }
  }
  }
  

3. AWS Services Proficiency:

• Accessing S3 Bucket from Another Account:

  aws s3 cp s3://bucket-name/path/to/file /local/path --profile accountA
  

• EC2 Instance Communication:
• Use VPC Peering or AWS PrivateLink for secure communication between instances in different subnets.

4. Containerization with Docker and Kubernetes:

• Dockerfile Example:

  FROM ubuntu:latest
  RUN apt-get update && apt-get install -y nginx
  CMD ["nginx", "-g", "daemon off;"]
  

• Kubernetes Deployment Example:

  apiVersion: apps/v1
  kind: Deployment
  metadata:
  name: nginx-deployment
  spec:
  replicas: 3
  selector:
  matchLabels:
  app: nginx
  template:
  metadata:
  labels:
  app: nginx
  spec:
  containers:</li>
  <li>name: nginx
  image: nginx:1.14.2
  ports:</li>
  <li>containerPort: 80
  

5. Terraform for AWS Resource Management:

• Importing VPC:

  terraform import aws_vpc.my_vpc vpc-0abcd1234efgh5678
  

• Managing Unmanaged Resources:
• Use `terraform import` to bring existing resources under Terraform management.

6. Troubleshooting and Debugging:

• Check Logs in Kubernetes:

  kubectl logs <pod-name>
  

• Debugging Jenkins Pipeline:
• Use the Jenkins Blue Ocean interface for visualizing pipeline execution.

What Undercode Say:

The interview questions and experience shared by Praveen Singampalli provide a comprehensive overview of what to expect in a Senior DevOps Engineer role at Walmart. The technical rounds focus heavily on AWS services, CI/CD pipelines, containerization, and infrastructure as code. Practical knowledge of tools like Jenkins, Docker, Kubernetes, and Terraform is essential. The managerial and HR rounds likely assess soft skills and cultural fit.

Expected Output:

• Linux Commands:

  </li>
  </ul>
  
  <h1>Check system logs</h1>
  
  journalctl -xe
  
  <h1>Monitor system resources</h1>
  
  top
  
  <h1>List running containers</h1>
  
  docker ps
  
  <h1>Get Kubernetes cluster info</h1>
  
  kubectl cluster-info
  

  • Windows Commands:

    :: Check system information
    systeminfo</li>
    </ul>
    
    :: List running processes
    tasklist
    
    :: Check network configuration
    ipconfig /all
    

    • AWS CLI Commands:

      </li>
      </ul>
      
      <h1>List S3 buckets</h1>
      
      aws s3 ls
      
      <h1>Describe EC2 instances</h1>
      
      aws ec2 describe-instances
      
      <h1>Check CloudWatch logs</h1>
      
      aws logs get-log-events --log-group-name /aws/lambda/my-function --log-stream-name my-stream
      

      This article serves as a valuable resource for aspiring DevOps engineers preparing for similar roles. The practical examples and commands provided should help in understanding and implementing the concepts discussed.

      References:

      Reported By: Praveen Singampalli – Hackers Feeds
      Extra Hub: Undercode MoN
      Basic Verification: Pass ✅

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