Tag Archives: Devops Interview Questions

DevOps Interview Questions And Answers

Our experts providing  DevOps  interview questions & Answers/Faqs can develop your carrier & knowledge to find the right job in a good MNC’s, doesn’t matter what kind of company you’re hired.

1. List the essential DevOps tools.
Git
Jenkins
Selenium
Puppet
Chef
Ansible
Nagios
Docker
Monit
ELK –Elasticsearch, Logstash, Kibana
Collectd/Collect
Git(GitHub)

2. What are the core roles of DevOps Engineers in terms of development and Infrastructure?
The core job roles of DevOps Engineer
Application development
Code developing
Code coverage
Unit testing
Packaging
Deployment With infrastructure
Continuous Integration
Continuous Testing
Continuous Deployment
Provisioning
Configuration
Orchestration
Deployment

3. What are the advantages of DevOps with respect to Technical and Business perspective?
Technical benefits:
Software delivery is continuous.
Reduces Complexity in problems.
Faster approach to resolve problems
Manpower is reduced.
Business benefits:
High rate of delivering its features
Stable operating environments
More time gained to Add values.
Enabling faster feature time to market
Learn more about DevOps advantages from this informative blog.

4. The scope for SSH?
SSH is a Secure Shell which provides users with a secure, encrypted mechanism to log into systems and transfer files.
To log out a remote machine and work on command line.
To secure encrypted communications between two hosts over an insecure network.

5. Which are the areas where DevOps are implemented?
Production Development
Creation of the production feedback and its development
IT Operations development

6. List the agile methodology of DevOps.
DevOps is a process
Agile is same as DevOps.
Separate group for are framed.
It is problem solving.
Developers managing production
DevOps is development-driven release management

7. List the major difference between the Agile and DevOps.
Agile:
Agile is about software development
Devops:
DevOps is about software deployment and management.
DevOps does not replace Agile or Lean. It does this by killing waste, removing handovers, and streamlining deployments to allow faster and more continuous deployments to PRODUCTION.

8. Name the popular scripting language of DevOps.
Python

9. How DevOps is helpful to developers?
To fix the bug and implement new features quickly.
It provides the clarity of communication among team members.

10. What are Vagrant and its uses.
Vagrant used virtual box as the hypervisor for virtual environments and in current scenario it is also supporting the KVM. Kernel-based Virtual Machine
Vagrant is a tool that can create and manage environments for testing and developing software.

11. What are the major difference between the Linux and Unix operating systems?
Unix:
It belongs to the family of multitasking, multiuser operating systems.
These are mostly used in internet servers and workstations.
It is originally derived from AT&T Unix, developed starting in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.
Both the operating systems are open source but UNIX is relatively similar one as compared to LINUX.
Linux:
Linux has probably been home to every programming language known to humankind.
These are used for personal computers.
The LINUX is based on the kernel of UNIX operating system.

12. How we can make sure new service is ready for the products launched?
Backup System
Recovery plans
Load Balancing
Monitoring
Centralized logging

13. What are the benefits of the NoSQL?
Non-relational and schema-less data model
Low latency and high performance
Highly scalable

14. What are adoptions of DevOps in industry?
Use of agile and other development processes and methods .
Demand for an increased rate of production releases from application and business.
Wide availability of virtual and cloud infrastructure from both internal and external providers;
Increased usage of data center ,automation and configuration management tools;
Increased focus on test automation and continuous integration methods;
Best practices on critical issues.

15. What are the advantages of NoSQL database over RDBMS?
The advantages are:
There is very less scope of ETL
Support is given for unstructured text
Changes are handle over period of time
Main objectives are functionality.
It has the ability to scale horizontally
Multiple data structures are given support.
Vendors can be chosen.

16. The top 10 skills the person should be having for the DevOp’s position?
Excellent in System Admin
Virtualization Experience
Good Technical Skills
Excellent Scripting
Good Developing skills
Chef in Automation Tool Experience
People Management
Customer Service
Real time Cloud operations
Who care about someone

17. Explain how the implementation of “Infrastructure as code” is processed or executed in terms of AWS.
In AWS,
The code will be in the simple JSON format.
This JSON code is well organized into files called templates.
This templates are deployed on AWS and then further managed as stacks
Cloud Formation service will help in doing the Creating, deleting, updating, etc. operation in the stack.

18. What measures we have taken to handle revision (version) control?
To handle revision control, post your code on SourceForge or GitHub so everyone can view it and ask the viewers to give suggestions for the better improvement of it.

19. What are the types of HTTP requests?
The types of Http requests are
GET
HEAD
PUT
POST
PATCH
DELETE
TRACE
CONNECT
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Devops Online Training

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Devops Course Content

Introduction of Devops

  • Devops for entire Business
  • Devops for entire IT
  • Devops for  Developer
  • Devops for Testing
  • Devops for  Operations Team
  • Role of Devops in Agile Scrum

 

Ansible Introduction & Setup

  • Configuration Management & Orchestration
  • Environment Setup
  • Installation

 

Foundation

  • Inventory
  • Dynamic Inventory
  • Host Selection
  • Tasks
  • Plays
  • Playbook Execution
  • cfg

 

Modules and Ad hoc Commands

  • Firewalld
  • Uri
  • Get_URL
  • APT/YUM
  • Service
  • User
  • Command
  • Shell
  • Copy
  • Fetch
  • Archive / Unarchive
  • File
  • Setup
  • Etc

 

YML Scripting

  • Basics of YML
  • How to write & test YML Scripts
  • YML scripting for writing Play Book

 

Play Book for CM automation

  • Writing play books
  • Execution of playbooks
  • System facts and Custom facts
  • Play book Notification
  • Play book tags & handlers
  • Exception handling

 

Roles

  • Roles Overview
  • Converting to Roles:
  • yml: include
  • Variables: facts
  • External Roles & Galaxy

 

Advanced Execution

  • Introduction
  • Removing Unnecessary Steps
  • Extracting Repetitive Tasks
  • Limiting Execution by Hosts
  • Limiting Execution by Tasks
  • Idempotence: changed_when, failed_when
  • Accelerated Mode and Pipelining

 

Troubleshooting, Testing, &Validation

  • Troubleshooting Ordering Problems
  • Jumping to Specific Tasks: list-tasks, step, start-at-task
  • Retrying Failed Hosts
  • Syntax-Check & Dry-Run: syntax-check, check
  • Debugging: debug

 

Docker Introduction

  • Installing Docker
  • Code or Text Editor for Docker and Compose files
  • Terminal Emulator and Shell for Docker

 

Creating and Using Containers

  • Starting a Nginx web server
  • What Happens When We Run a Container
  • Container VS. VM
  • Manage Multiple Containers
  • CLI Process Monitoring
  • Getting a Shell Inside Containers: No Need for SSH
  • Package Management Basics: apt, yum, dnf, pkg
  • Docker Networks: Concepts for Private and Public
  • Docker’s –format option for filtering cli output

 

Container Images

  • What’s In An Image
  • Official Docker Image Specification
  • The Mighty Hub: Using Docker Hub Registry Images
  • List of Official Docker Images
  • Images and Their Layers: Discover the Image Cache
  • Images and Containers From Docker Docs
  • Image Tagging and Pushing to Docker Hub
  • Building Images: The Docker file Basics
  • Building Images: Running Docker Builds
  • Building Images: Extending Official Images

 

Docker Compose: The Multi-Container Tool

  • Docker Compose and The docker-compose.yml File
  • The YAML Format: Sample Generic YAML File
  • Compose File Version Differences (Docker Docs)

 

Getting started with Jenkins

  • Getting started with Jenkins
  • Introduction to Continuous Integration
  • Install Jenkins
  • Jenkins’ Architecture and Terms of Jenkins of
  • Jenkins UI : Dashboard and Menus
  • Create Our First Jenkins Job

 

Continuous Integration with Jenkins

  • Continuous Integration with Jenkins
  • Install Git and Jenkins GitHub Plugin
  • Install Maven on Our Local Box
  • Configure Jenkins to Work with Java, Git and Maven
  • Text Direction: Create our First Maven-based Jenkins Project
  • Create our First Maven-based Jenkins Project
  • Trouble Shooting: Create our First Maven-based Jenkins Project
  • Run our First Jenkins Build and Jenkins Workspace
  • Source Control Polling in Jenkins
  • Text Direction: Source Control Polling in Jenkins
  • Other Build Triggers of Jenkins
  • Text Direction: Other Build Triggers

 

Continuous Inspection with Jenkins

  • Code Quality and Code Coverage Metrics Report
  • Jenkins’ Support for Gradle, Ant and Shell Scripts

 

Continuous Delivery with Jenkins

  • Archive Build Artifacts
  • Install and Configure Tomcat as the Staging Environment
  • Deploy to Staging Environment
  • Jenkins Build Pipeline
  • Parallel Jenkins Build
  • Deploy to Production
  • Trouble Shooting: Deploy to Production

 

Distributed Builds (Master-Slave)

  • Introduction to Distributed Jenkins Build
  • Install Jenkins Master Node in the Cloud
  • Text Direction: Install Jenkins Master Node in the Cloud
  • Install Jenkins Slave Agents in the Cloud
  • Text Direction: Install Jenkins Slave Agents in the Cloud
  • Concurrent Jenkins Build and Label Jenkins Build
  • Continuous Delivery with Jenkins

 

Pipeline as Code (Using Groovy)

  • Basics groovy scripting
  • Writing groovy code to implement CICD
  • Groovy Jenkins files
  • User approvals
  • Checkout the code from GIT
  • Deploying the code into web server

Build Promotions

 

SVN

  • Creating account in Subversion
  • Installing tortoise SVN
  • Check in and checkout of SVN
  • Branch and Trunck

 

Git

  • Installation
  • Git local repo and GIT Hub
  • Configuration
  • Basic Commands
  • Branches
  • push and pull from GIT Hub

 

Maven

  • Introduction
  • Understanding build process
  • Creating Maven from command prompt
  • Maven Dependencies
  • Maven Stages
  • Maven Repositories
  • Maven Plugins
  • Integrating maven with Jenkins

 

 

Nagios

  • Installation of Nagios
  • Configuring Nagios
  • Monitoring with Nagios
  • Triggering Alerts

 

AWS

  • Environment setup in AWS
  • Cloud Deployment Scenarios in AWS
  • Continuous Delivery in AWS
  • Using Vagrant in AWS
  • Using Docker containers in AWS

 

LINUX

  • Basic Commands
  • File Operations
  • Redirection
  • Piping
  • Permissions
  • User Controls
  • Shell Scripting

 

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