Top 23 Devops Interview Questions You Must Prepare 14.Jun.2024

The most popular DevOps tools are mentioned below:

Git: Version Control System tool

Jenkins: Continuous Integration tool

Selenium: Continuous Testing tool

Puppet, Chef, Ansible: Configuration Management and Deployment tools

Nagios: Continuous Monitoring tool

Docker: Containerization tool

To fix the bug and implement new features quickly. It provides the clarity of communication among team members.

There are many industries that are using DevOps so you can mention any of those use cases, you can also refer the below example:

Etsy is a peer-to-peer e-commerce website focused on handmade or vintage items and supplies, as well as unique factory-manufactured items. Etsy struggled with slow, painful site updates that frequently caused the site to go down. It affected sales for millions of Etsy’s users who sold goods through online market place and risked driving them to the competitor.

With the help of a new technical management team, Etsy tritioned from its waterfall model, which produced four-hour full-site deployments twice weekly, to a more agile approach. Today, it has a fully automated deployment pipeline, and its continuous delivery practices have reportedly resulted in more than 50 deployments a day with fewer disruptions.

  1. Use of agile and other development processes and methods.
  2. Demand for an increased rate of production releases from application and business.
  3. Wide availability of virtual and cloud infrastructure from both internal and external providers;
  4. Increased usage of data center ,automation and configuration management tools;
  5. Increased focus on test automation and continuous integration methods;
  6. Best practices on critical issues.

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.

A pattern is common usage usually followed. If a pattern commonly adopted by others does not work for your organization and you continue to blindly follow it, you are essentially adopting an anti-pattern. There are myths about DevOps.

Some of them include:

  • DevOps is a process
  • Agile equals DevOps
  • We need a separate DevOps group
  • Devops will solve all our problems
  • DevOps me Developers Managing Production
  • DevOps is Development-driven release management
  1. DevOps is not development driven.
  2. DevOps is not IT Operations driven.
  • We can’t do DevOps – We’re Unique
  • We can’t do DevOps – We’ve got the wrong people

Technical benefits:

  • Continuous software delivery
  • Less complex problems to fix
  • Faster resolution of problems

Business benefits:

  • Faster delivery of features
  • More stable operating environments
  • More time available to add value (rather than fix/maintain)

  • 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

Talk about multiple software builds, releases, revisions, and versions for each software or testware that is being developed. Move on to explain the need for storing and maintaining data, keeping track of development builds and simplified troubleshooting. Don’t forget to mention the key CM tools that can be used to achieve these objectives. Talk about how tools like Puppet, Ansible, and Chef help in automating software deployment and configuration on several servers.

The core operations of DevOps:

  • Application development
  • Code developing
  • Code coverage
  • Unit testing
  • Packaging
  • Deployment With infrastructure
  • Provisioning
  • Configuration
  • Orchestration
  • Deployment

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

  • Non-relational and schema-less data model
  • Low latency and high performance
  • Highly scalable

Given below is a generic logical flow where everything gets automated for seamless delivery. However, this flow may vary from organization to organization as per the requirement.

  1. Developers develop the code and this source code is managed by Version Control System tools like Git etc.
  2. Developers send this code to the Git repository and any changes made in the code is committed to this Repository.
  3. Jenkins pulls this code from the repository using the Git plugin and build it using tools like Ant or Maven.
  4. Configuration management tools like puppet deploys & provisions testing environment and then Jenkins releases this code on the test environment on which testing is done using tools like selenium.
  5. Once the code is tested, Jenkins send it for deployment on the production server (even production server is provisioned & maintained by tools like puppet).
  6. After deployment It is continuously monitored by tools like Nagios.
  7. Docker containers provides testing environment to test the build features.

Chef is considered to be one of the preferred industry-wide CM tools. Facebook migrated its infrastructure and backend IT to the Chef platform, for example. Explain how Chef helps you to avoid delays by automating processes. The scripts are written in Ruby. It can integrate with cloud-based platforms and configure new systems. It provides many libraries for infrastructure development that can later be deployed within a software. Thanks to its centralized management system, one Chef server is enough to be used as the center for deploying various policies.

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. Devops Training Free Demo

  • Backup System
  • Recovery pl
  • Load Balancing
  • Monitoring
  • Centralized logging

According to me, the most important thing that DevOps helps us achieve is to get the changes into production as quickly as possible while minimizing risks in software quality assurance and compliance. This is the primary objective of DevOps.

For example: clearer communication and better working relationships between teams i.e. both the Ops team and Dev team collaborate together to deliver good quality software which in turn leads to higher customer satisfaction.

The more popular DevOps tools include:

  • Selenium
  • Puppet
  • Chef
  • Git
  • Jenkins
  • Ansible
  • Docker Devops Online Training

  1. SSH is a Secure Shell which provides users with a secure, encrypted mechanism to log into systems and trfer files.
  2. To log out a remote machine and work on command line.
  3. To secure encrypted communications between two hosts over an insecure network.

Agile is a set of values and principles about how to produce i.e. develop software.

Example: if you have some ideas and you want to turn those ideas into working software, you can use the Agile values and principles as a way to do that. But, that software might only be working on a developer’s laptop or in a test environment. You want a way to quickly, easily and repeatably move that software into production infrastructure, in a safe and simple way. To do that you need DevOps tools and techniques.

You can summarize by saying Agile software development methodology focuses on the development of software but DevOps on the other hand is responsible for development as well as deployment of the software in the safest and most reliable way possible. Here’s a blog that will give you more information on the evolution of DevOps.

According to me, this wer should start by explaining the general market trend. Instead of releasing big sets of features, companies are trying to see if small features can be trported to their customers through a series of release trains. This has many advantages like quick feedback from customers, better quality of software etc. which in turn leads to high customer satisfaction.

To achieve this, companies are required to:

  • Increase deployment frequency
  • Lower failure rate of new releases
  • Shortened lead time between fixes
  • Faster mean time to recovery in the event of new release crashing

DevOps fulfills all these requirements and helps in achieving seamless software delivery. You can give examples of companies like Etsy, Google and Amazon which have adopted DevOps to achieve levels of performance that were unthinkable even five years ago. They are doing tens, hundreds or even thousands of code deployments per day while delivering world class stability, reliability and security.

  • Production Development
  • Creation of the production feedback and its development
  • IT Operations development