DevOps Interview Questions and Answer: DevOps, which is a short form for Development and Operations, is a software engineering practice. It concentrates on bringing together the development team & the operations team to computerize projects at all stages. Thus, if you are a DevOps engineer and prepare for an interview, you are in the right place. Here you will get a variety of questions that you are likely to be asked together with the answer you need to give.

Everyone moves into an interview room with hopes that they will get the job. Moreover, with proper preparations and the required skills, experience, and knowledge, you will make it. However, this job market is more competitive, & DevOps Interview Questions and Answer can cover more challenging subjects.

With the DevOps interview questions and answers given below, you will understand what to encounter. Moreover, these DevOps interview questions are divided into three sections: basic level, moderate level, and expert level for proper preparations.

Basic Level DevOps Interview Questions and Answer

Explain DevOps?

DevOps is derived from two words. One of the words is software Development & the other word is Operations. This enables one team to handle the whole application lifecycle, from development, deployment, to testing & operations. Furthermore, DevOps will assist one in reducing disconnection that’s in between quality assurance engineers, system administrators, and software developers.

Explain tools of DevOps?

Some of the popular tools of DevOps include:

  • Ansible: This is a top DevOps tool. It’s an open-source engine that automates apps deployment, cloud provisioning & other tools.
  • Jenkins: This is a DevOps tool used for monitoring the execution of recurrent tasks. Moreover, it also allows continuous integration & it’s installed on servers because this is where the central build occurs.
  • Nagios: This is a helpful tool when it comes to DevOps. It helps in determining the errors & rectifies them with the help of infrastructure, network, log monitoring systems, and server.
  • Git: It’s an open-source distributed control system that’s freely accessible for every person. It’s made to deal with minor to significant tasks with efficiency and speed.
  • Docker: This is a high-end DevOps tool that enables ships, building, & running distributed apps on several systems.

What is CAMS in DevOps?

CAMS is a short form for Culture, Automation, Measurement, & Sharing, representing DevOps’ core deeds.

Name 3 DevOps KPIs.

The three more common DevOps KPIs include:

  • Deployment frequency
  • Mean-time to failure recovery
  • Percentage of unsuccessful deployments

What are the principles behind DevOps?

The principles of DevOps include:

  • Infrastructure as code
  • Continuous deployment
  • Automation
  • Security
  • Monitoring

What are the business & technical advantages of DevOps work culture?

The technical advantages of DevOps work culture include:

  • Less complex issues to fix
  • Faster bugs resolution
  • Constant software delivery
  • The business benefits of DevOps work culture include:
  • More steady operating environments
  • Quicker delivery of features intended for customer satisfaction
  • More time for adding product value

Why do open-source tools boost DevOps?

Open-source tools are majorly used by organizations that are adapted by the DevOps pipeline. The reason being, DevOps came has a lot of emphasis on automation in different aspects of organization release, build infrastructure management places, and change management.

Explain pair programming concerning DevOps?

This is an engineering practice with Extreme Programming Rules. Two programmers operate on similar systems on the same algorithm or design. One programmer works as a Driver & the other one is an Observer that constantly monitors identify problems in a project. The roles are reversed at every point of time minus a prior intimation.

What’s DevOps Automation?

DevOps Automation is a crucial requirement for DevOps practices. Automating everything is the central principle of DevOps. Moreover, automation begins from code generation on the developer’s machine up to when the code is pushed to monitor the system and application in production. Automation in DevOps improves speed, higher accuracy, consistency, reliability, & increases deliveries numbers.

What’s Continuous Testing?

Continuous Testing is a phase of DevOps that involves running computerized test cases as a section of an automatic software delivery pipeline. It helps get instant feedback concerning the quality & validation of business dangers linked with the automated code development by developers.

This phase assists the team in testing every build constantly. Thus the development team will have a chance to get immediate feedback on their work. This will ensure that no problems will arrive in later stages of the development cycle.


Moderate Level DevOps Interview Questions and Answer

What’s the function of AWS in DevOps?

The role of AWS in DevOps includes

  • Built for scale: You’ll manage a scale or single instance to more using the AWS services.
  • Secure: AWS Identity & Access Management allows you to set user permissions & policies.
  • Flexible services: This offers ready-to-use and flexible services minus installing the software
  • Automation: AWS enables one to automate processes and tasks, offering you sufficient time to innovate
  • Large-partner ecosystem: AWS supports an extensive ecosystem of partners which integrates with extended AWS services.

What’s the function of configuration management in DevOps?

  • Allows management of & changes to numerous systems
  • It assists the administration & management of several servers & maintains the integrity of the whole infrastructure
  • Regulates resource configurations, and as a result, IT infrastructures are managed

What’s the use of SSH?

SSH (Secure Shell ) is an administrative protocol that allows users to have control and access remote servers via the Internet. This will enable you to operate using a command line. Moreover, SSH is a secure encrypted version of Telnet that wasn’t encrypted and secure. This guarantees that communication with a remote server happens in an encrypted format.

Furthermore, SSH has a mechanism for input communication among the client & the host, sending output back to the client and remote user authentication.

What are various phases in DevOps methodology?

DevOps methodology is majorly divided into 6 phases. They include:

Planning: It’s the first phase of the DevOps lifecycle. It involves a detailed project understanding ultimately develops the superb product. When it’s done correctly, this phase offers various inputs needed for the operations and development phases. Furthermore, this phase also assists the organization in gaining clarity concerning the project development & management process. The tools used in this phase include Google Apps, Microsoft teams, Asana, etc.

Development: The development phase follows the planning phase. This involves building a project by developing features (writing codes), automation process, developing system infrastructure & defining test cases. Developers in this phase save their principles in a code manager known as a remote repository. This helps in team collaboration by permitting view, versioning of regulation, and modification. Tools used in this phase include Git, IDEs (eclipse), technological stacks (Node, Java), IntelliJ, etc.

Continuous Integration (CI): In this third phase, automation of code-validation, testing, and build are allowed. This guarantees that changes are properly made minus development environment errors. Moreover, it also enables errors identification at the initial stage. Tools used in this phase include circleCI, Jenkins, etc.

Deployment phase: DevOps helps in the deployment automation process. This is possible by using tools & scripts that have the final goal of process automation by feature activation. Cloud services are utilized as a force that assists in upgrading from more infrastructure management to cost-optimized management. Tools used in this phase include Microsoft Azure, Heroku, Amazon Web Services, etc.

Operations: Operations phase normally occurs thru the product/software lifecycle. Furthermore, it also offers the team chances for improving the availability, effective transformation & scalability of the product. The tools used in this phase include Loggly, Appdynamics, BlueJeans, etc.

Monitoring: This is a permanent phase of DevOps methodology. The phase is normally utilized for monitoring & analyzing data to understand software applications’ status. Tools that are commonly used include Splunk, Nagios, etc.

What are the advantages of using Git?

  • High availability
  • Data replication & redundancy
  • Only a single Git directory in a repository
  • Collaboration friendly
  • Used for every kind of projects
  • Superior disk utilization & network performance

Which are some of the cloud platforms used for DevOps implementation?

Some of the cloud computing platforms utilized for DevOps implementation includes

  1. Amazon Web Services
  2. Google Cloud
  3. Microsoft Azure

Sate network monitoring tools?

Some of the more common network monitoring tools include Wireshark, Nagios, Splunk, OpenNMS, and Icinga 2.

How to push a file from a local system to a GitHub repository through Git?

First of all, you need to connect the local repository to a remote repository.

file from a local system to a GitHub repository through Git

Then, push the file to a remote repository

push the file to a remote repository

Which commands are used to restart Jenkins manually?

Two ways which are used to manually restart Jenkins includes

What’s Resilience Testing?

This is a software process that tests an app for its performance under uncontrolled & chaotic scenarios. Furthermore, it also guarantees that data & functionality aren’t lost after a failure is encountered.


Expert Level DevOps Interview Questions and Answer

What’s Scrum?

Scrum is utilized in dividing a sophisticated software & product development job into smaller chunks. This is done using iterations & increasing practices. Moreover, scrum is comprised of three roles which includes

  1. Product owner
  2. Team
  3. Scrum master

What’s Azure DevOps?

Azure DevOps (Microsoft visual-studio team services) is a set with collaborative-development tools made for the cloud. Moreover, VSTS is commonly utilized as a separate term & Azure DevOps is made with different products, which includes: Azure Test-Plans, Azure-Pipeline, Azure Repos, Azure Boards, Azure Artifacts

What’s Git stash?

This is a command that’s utilized to save changes made temporarily in the working directory. Thus, a developer will have a clean directory for him/her to work on. Later the changes are merged in Git workflow.

What’s the command to sign requested certificates?

With Puppet version 2.7:

command to sign requested certificates

What’s a class in Puppet?

These are named blocks in one’s manifest, configuring numerous node functionalities, including services, packages, and files. Furthermore, classes are added to the node’s catalog & are performed just when invoked.

class in Puppet

When should ‘{{ }}’ be used?

{{}} is always used for variables, unless you have a conditional statement, like “when: …”. The reason being conditional statements run through Jinja, which resolves an expression. For example

used for variables

What is the shift-left in DevOps?

This means the need to take as numerous tasks at the right side. It typically occurs at the end of an application development process. It also incorporates them in earlier stages of DevOps methodology.

There are more ways of achieving a shift-left in DevOps. They include:

  • Combining static-code study routines in each build
  • Creating ready artifacts of all Agile-sprint at the end

How do you ensure a script operates all time the repository gets a new commit via Git push?

There are three means of setting a script on the destination repository. These ways are known as hooks & they are of 3 kinds. They include:

Update hook: This triggers a script to operate before updates are made. Moreover, the update hook is called one time for every commit that’s pushed to the repository.

Pre-receive hook: It’s invoked before references are updated. Moreover, this hook is important in ensuring scripts linked to enforcing making policies are run.

Post-receive hook: This helps in triggering the script after changes or updates are accepted by the destination repository. Moreover, this hook is suitable for aligning deployment scripts, email notifications methods to a team, or continuous integration-based scripts.

What’s CBD?

CBD is a short form of Component-Based Development, and it’s a distinct method of approaching product development. With this method, developers always check for tested, verified components and existing well defined to compose & assemble.

What’s Build in DevOps?

The build is how a source code is placed to confirm if it’s working as a single entity. With the build creation process, source code undergoes compilation, inspection, deployment, and testing.

Conclusion

DevOps Interview Questions and Answer : DevOps has, and it’s continuing to help a lot of organizations and businesses. Being a DevOps engineer offers you a great benefit due to ever-increasing requests for DevOps practice. Thus, you have a chance to pass that interview that awaits you for this excellent job.

Be sure that you will find the panel asking most of these questions. Take your time, prepare well, and all will be well.