DevOps is not just an important tool for IT professionals, but a philosophy, a journey, and a culture. Even though this tool has recently come to the fore, its importance has never been more pronounced.
If you are an IT professional considering a career in DevOps, you will not find a better opportunity to flourish as a DevOps professional in the industry. To help you achieve your dream, I have compiled a comprehensive set of DevOps questions and answers that will help you breeze past your interview and land you an attractive job in this domain.
- What is DevOps?
DevOps is an important facet of the software engineering culture. It aims at the integration of software development (Dev) and software operation (Ops). It focuses on automation to monitor all steps of software construction, from integration, testing, and delivery to ensure shorter development cycles and deliveries adhering to business needs.
- What is the need for DevOps?
As already mentioned, DevOps plays an important role in providing faster deliveries with lower rate of failures. If we take a look at major companies like Google and Amazon, they are delivering tens, hundreds or even thousands of code deployments per day with world class stability, reliability and security. This is possible only with the adoption of DevOps. This ensures –
- Software defects are eliminated quickly
- Resource management is more optimal
- Human errors are minimized
- Version control is more accurate & simpler
- A stable operating environment
- List the essential DevOps tools.
A few essential tools for DevOps professionals are –
- Git : Version Control System tool
- Docker : Containerization tool
- Selenium : Continuous Testing tool
- Jenkins : Continuous Integration tool
- Nagios : Continuous Monitoring tool
- Puppet, Chef, Ansible : Configuration Management and Deployment tools
- What are the advantages of DevOps with respect to technical and business perspective?
DevOps implementation offers a number of benefits to both technology teams & the business as a whole. Some of the technical benefits are –
- Continuous software delivery.
- Reduces complexity in problems.
- Faster approach to resolve problems
- Reduced Manpower.
Some of the business benefits are-
- Enhanced version control.
- Stable operating environments
- High rate of delivering its features
- Better resource management
- List the major industry sectors where DevOps enjoys widespread popularity.
DevOps experiences large scale implementations across diverse industries. To name a few, DevOps is implemented in the following areas-
- Production development
- Creation of the production feedback and its development
- IT operations development
- What is the major difference between Agile and DevOps.
Agile and DevOps may go hand-in-hand but there is a clear difference in scope between the two. Agile deals solely with software and product development while DevOps deals with development, followed by deployment of the software, ensuring faster turnaround time, minimum errors, and reliability. DevOps does not replace Agile, but it kills waste, removes handovers and streamlines deployments to allow faster and more continuous deployments to production.
- Name the most popular scripting language used in DevOps.
Python is the most popular scripting language of DevOps.
- What is version control and what are its advantages?
Version Control is a system or framework that is used to manage multiple versions and changes of a file or a set of files over time. It records changes to the files so that you can recall specific versions later. Version control systems consist of a central shared repository where teammates can commit changes to a file or set of file.
Advantages of version control are –
- It allows you to revert files back to a previous state.
- It allows you to revert the entire project back to a previous state.
- Every time you make a change it requires you to provide a description of the change. This allows you to know who has made what changes in the project.
9. What are containers in DevOps?
Containers are a form of lightweight virtualization. They are heavier than ‘chroot’ but lighter than ‘hypervisors’. Containers enable developers to work with identical development environments and stacks, but they also facilitate DevOps by encouraging the use of stateless designs. The primary usage for containers is simplifying DevOps with easy developer to test to production flows for services deployed, often in the cloud.
- What are the core operations of DevOps in terms of development and Infrastructure?
Core operations of DevOps in terms of development are-
- Code developing
- Code coverage
- Unit testing
Core operations in terms of infrastructure are-
- What is Git?
Git is a free and open source version control system that is designed for tracking changes in computer files. It allows you to revert back to any particular change. It can handle everything from small to very large projects and is aimed at speed, efficiency and data integrity.
- what are the types of Http requests?
The types of Http requests are
- What is Vagrant and why is it used?
Vagrant is a virtual tool used to handle virtual environments. It is mainly used to create and manage virtual environments for testing and developing software.
- What is Continuous Integration?
Continuous integration is a development practice in which developers work on a program code in their private workspaces and then integrate it into a common repository. When they are done with their code and integrate it into the repository, the CI server monitors the changes and runs an integration test. The server then informs the team of a successful build. In case the test fails, it alerts the team which can subsequently fix the issue at an early stage. This ensures a continuous flow by allowing teams to detect problems early.
15. Why do you need a Continuous Integration of Dev & Testing?
Continuous Integration is a smarter way to go about program development and testing. It integrates development and testing into one process by ensuring both are taken care of at the same time. Thus it helps in reducing the delivery time significantly. It also ensures improved quality of software by allowing the development team to easily detect and locate problems early because developers need to integrate code into a shared repository several times a day which is then automatically tested.
So these are 15 important questions that you are likely to face in your DevOps interviews. If you are looking to upgrade your skills in DevOps, choose from our range of DevOps training courses and get yourself industry-ready to enjoy a successful career in the IT industry.
Do let us know how your interview went – don’t hesitate to leave us a comment here!