o9 Solutions Devops Engineer Interview Questions and Answers

SQL, Java, Python, Reasoning

Q1. Leaders in ARRAY program
Ans. 
Leaders in ARRAY program
• The ARRAY program is not specified, so it's difficult to determine the leaders

• Leadership can be determined by various factors such as experience, skills, and contributions

• It's important to have strong leaders in any program to ensure its success
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Q1. Basic concepts of CN, OS , OOPS and knowledge on cloud
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Q2. Reverse a string , linux concepts
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Q1. Experience related questions
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It was moderately tough.

Q1. Good DSA knowledge will help
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Q1. DSA knowledge and Computer fundamentals knowledge.
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Q1. Be confident and speak honestly, will help.
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Q1. Basic Kubernetes
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Q2. Write Terraform and Ansible script
Ans. 
Write Terraform and Ansible script
• Use Terraform to provision infrastructure resources like virtual machines, networks, and storage

• Use Ansible to configure and manage software on the provisioned infrastructure

• Create a Terraform script to deploy a virtual machine on AWS

• Write an Ansible playbook to install and configure Nginx on the deployed virtual machine
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English and Reasoning

Q1. Past experience in devops
Ans. 
I have 5 years of experience in implementing DevOps practices in various organizations.
• Implemented CI/CD pipelines using tools like Jenkins, GitLab CI, and CircleCI

• Automated infrastructure provisioning with tools like Terraform and Ansible

• Managed containerized applications using Docker and Kubernetes

• Monitored and maintained production systems with tools like Prometheus and Grafana
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Q2. Scripted jeninsfile for CI
Ans. 
A scripted Jenkinsfile is a Groovy script that defines the pipeline for Continuous Integration (CI).
• Use 'pipeline' block to define the stages of the CI pipeline

• Utilize 'stage' block to specify individual stages within the pipeline

• Leverage 'steps' block to define the actions to be executed within each stage

• Use 'node' block to allocate a Jenkins agent for running the pipeline

• Utilize 'checkout' step to fetch the source co
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Q1. WAF implementation in AWS
Ans. 
Implementing a Web Application Firewall (WAF) in AWS for enhanced security.
• Use AWS WAF to protect web applications from common web exploits.

• Create rules to filter and monitor HTTP and HTTPS requests.

• Integrate AWS WAF with other AWS services like CloudFront or API Gateway for comprehensive protection.
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Q2. Write a CD jenkinsfile
Ans. 
A CD Jenkinsfile automates the Continuous Delivery process in Jenkins.
• Define stages for build, test, deploy

• Use declarative syntax for pipeline

• Include steps for version control, artifact management

• Utilize plugins for notifications, approvals

• Implement error handling and rollback mechanisms
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Q1. Aws, kubernetes, jenkins, ci/cd, terraform, linux, shell script
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Q1. Job breakdown, docker, jenkins, sre check, jenkins automation
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Q2. Mostly related to jenkins automation and automation scripting
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There will be 4 round 1-HR, 2nd will be tech 3rd will be tech and 4th will take VP