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Questions to be prepared for devops engineer interview

Before preparing for devops engineer interview questions,let’s know something about What is DevOps and What is a DevOps Engineer.  

Before preparing for devops engineer interview questions,let’s know What is DevOps -Software development (Dev) and information technology operations (Ops) are combined in a set of processes and practices known as DevOps to enhance the effectiveness and caliber of software development, delivery, and deployment (Ops).

The main goal of DevOps is to facilitate easy collaboration between the development and operations teams throughout the entire software development life cycle by encouraging teamwork between them. The software development process is also sped up and error-free thanks to automation, continuous integration, delivery, and deployment.

What is a DevOps Engineer? 

A DevOps engineer is a specialist in using DevOps methodology and practices in the development, deployment, and maintenance of software systems.

Software developers, IT operations teams, and other stakeholders work closely with DevOps engineers to ensure the successful delivery of software products. They oversee the implementation of continuous delivery/deployment (CI/CD), automation, and integration strategies to improve the productivity and caliber of software development. Throughout the development process, they also identify and fix problems.

Questions to be prepared for devops engineer interview

Here are some questions which can help you to crack DevOps engineer interview

1. Which are the most widely used DevOps tools:

The following is a list of the most widely used DevOps tools:

  • Git: A tool for version control systems
  • Jenkins: A tool for continuous integration
  • Selenium: A tool for continuous testing
  • Chef, Puppet, Ansible: Tools for Deployment and Configuration Management
  • Nagios: A tool for continuous monitoring
  • Docker: A tool for containerization

2.Describe the various stages of the DevOps methodology.

  • Planning : In order to create the best product possible, this is the first stage of the DevOps lifecycle, which entails having a complete understanding of the project. When carried out correctly, this phase provides a variety of inputs needed for the phases of development and operations. Additionally, this phase aids in the organization’s clarification of the project development and management procedure. For this, programs like Microsoft Teams, Asana, Google Apps, and others are used.
  • Development : After the planning stage, the project moves into the development phase, where features are written, system infrastructure is developed, test cases are defined, and the automation process is established. Code is kept by developers in a code manager known as a remote repository, which facilitates teamwork by enabling code viewing, editing, and versioning.Technological stacks like Node, Java, etc., as well as tools like git and IDEs like Eclipse and IntelliJ, are used.
  • Continuous Integration (CI): Automation of code validation, build, and testing is possible during this phase. This guarantees that the changes are made correctly and free of errors in the development environment, as well as enabling the early detection of errors.Here, tools like circleCI, Jenkins, and others are used.
  • Deployment: With the ultimate goal of automating the process through feature activation, DevOps uses tools and scripts to assist in the deployment automation process. In this case, cloud services can act as a driving force behind the transition from managing a finite infrastructure to one that is cost-optimized and has access to infinite resources.There is use of tools such as Heroku, Amazon Web Services, Microsoft Azure, and so on.
  • Operations: Because of the constantly changing infrastructure, this phase typically occurs during the course of the software or product lifecycle. This gives the team the chance to improve the product’s availability, scalability, and transformation effectiveness.During this stage, tools like Appdynamics, BlueJeans, Loggly, and others are frequently used.
  • Monitoring: A continuous component of the DevOps process is monitoring. This stage is used to track and analyze data in order to determine the software applications’ current state.Commonly used tools include Nagios, Splunk, and others.
Questions to be prepared for devops engineer interview

3.What is the role of AWS in DevOps ?

Because it offers an extensive range of cloud computing services that help businesses develop, implement, and manage applications more effectively, Amazon Web Services (AWS) is essential to DevOps. Numerous services and tools provided by AWS correspond with different stages of the DevOps lifecycle.

DevOps teams can increase the automation, scalability, and flexibility of their infrastructure and application deployment processes by utilizing AWS services. Thus, the software development lifecycle becomes more efficient overall, with faster delivery cycles and better cooperation between the development and operations teams.

4,List the top three DevOps KPIs.

  • The average amount of time needed to recover from a failure is called the “meantime to failure recovery.”
  • Frequency of deployment: The regularity of the deployment.
  • The number of times a deployment fails is the percentage of failed deployments.

5.What is Memcached ?

A distributed memory caching system with high performance that is open-source is called Memcached. It is frequently used to reduce database load, which speeds up dynamic web applications. Random-access memory (RAM) on the server is where Memcached, a C-developed distributed in-memory key-value store, stores data for quick and easy access.

The following scenarios call for the usage of memcached:

  • Facebook and other social networking sites cache user profiles.
  • Caching of webpages within the content aggregation realm.
  • In the ad targeting domain, profile tracking.
  • session caching in the gaming, entertainment, and e-commerce industries.
  • The domain of location-based services involves the optimization and scaling of database queries.

6.What is CBD in DevOps?

Component-Based Development is referred to as CBD. It’s a novel method of going about product development. Here, developers avoid having to write all the code from scratch by continuing to search for pre-existing, thoroughly defined, tested, and verified code components.

7.How is AWS used to implement IaC?

Begin by discussing how Infrastructure as a Service (IaC) is replacing the time-honored method of writing commands into script files and testing them in a separate environment before deployment. With the aid of AWS, Infrastructure as a Code (IaC) enables developers to write, test, and maintain infrastructure entities in a descriptive fashion using formats like JSON or YAML. This is similar to the codes written for other services. This makes it possible to develop and implement infrastructure changes more quickly and easily.

Questions to be prepared for devops engineer interview

8.What is DevOps anti-patterns ?

An anti-pattern is typically a complicated or cumbersome solution that might help you temporarily but can have unfavorable long-term effects that outweigh the benefits. This article aims to identify various anti-patterns, elucidate their causes, and provide preventive measures.

  • Unable to execute DevOps → Inappropriate personnel
  • DevOps ⇒ Developers handle production management.
  • DevOps: the panacea for all organizational issues
  • DevOps == Procedure
  • Agile == DevOps
  • Unable to execute DevOps → Every organization is different.
  • It is necessary to create a separate group for DevOps.

9.What is Continuous Testing ?

Running automated tests as part of the software delivery pipeline to give immediate feedback on the business risks in the most recent release is known as continuous testing. Every build is continuously tested in this way to avoid issues with step-switching in the software delivery life-cycle and to enable development teams to get quick feedback. As a result, a developer’s productivity increases significantly faster because there is no longer a need to rerun all of the tests following updates and project rebuilds.

10.What role does configuration management play in DevOps ?

By helping the team automate laborious and time-consuming tasks, configuration management (CM) improves the performance and agility of the organization.By using techniques for design streamlining, thorough documentation, control, and change implementation throughout different project phases and releases, it also aids in bringing consistency and enhancing the product development process.

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