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Essential DevOps Interview Questions

The following section has the top DevOps Interview questions and answers that will help you prepare for the next career change or DevOps Interview.

Question: What is DevOps?

Answer: DevOps is a new practice in the IT (Information Technology) field that involves the collaboration and communication of software developers and operations. Its main objective is to deliver software products faster while lowering the failure rates of releases at the same time.

Question: What are DevOps Principles?

Answers: Below are the principles on which DevOps is based.

  • Continuous Integration(CI)
  • Continuous deployment (CD)
  • Infrastructure as code
  • Automation
  • Monitoring Security

Question: What are different cloud-based platforms that provide DevOps implementations?

Answer: Below is the cloud-based platforms that provide DevOps-based Implementation.

  1. Amazon Web Services(AWS)
  2. Google Cloud Platform(GCP)
  3. Microsoft Azure

Question: What are different DevOps-based tools?

Answer: Following are some DevOps-based tools.

  • Maven
  • Jenkins
  • Git
  • Puppet
  • Chef
  • Ansible
  • Docker
  • Nagios

Question: What is the advantage of configuration management in DevOps?

Answer: Below are the main advantages that configuration management has.

  • It allows the infrastructure team in an organization to make all the configuration standards across the cluster.
  • It facilitates managing and administering multiple servers in the cluster.
  • Furthermore, it provides a common interface to manage the configuration on multiple systems.

Question: How do you define dependencies using Apache Maven?

Answer: We use a file called pom.xml to define all the dependencies using Apache Maven. Once we define the dependencies in this file, all the needed dependencies will be downloaded that can be used in a project.

Question: What is Puppet?

Answer: Puppet is a software configuration management tool that helps to automate administrative tasks like configuration management and software deployment. It is mainly used for server configuration, deployment, and orchestration of various applications across several servers.

Question: What are different Software/tools used for network monitoring?

Answer: followings are some software or tools used for network monitoring.

  • Grafana
  • ELK Stack
  • Splunk
  • Wireshark
  • Nagios
  • OpenNMS

Question: What are different KPIs (Key Performance Indicators) used in DevOps?

Answer: Following are some Common KPIs that are used in DevOps-related projects

  • Deployment (CI-CD) Frequency
  • Failed Deployment Percentage
  • Meantime to Failure, Recovery

Question: What are the core operations of DevOps?

Answer: We can divide the core components of DevOps based on two categories.

Application development

  • Code building/Development
  • Code coverage
  • Unit testing
  • Packaging
  • Delivery
  • Integration

Infrastructure

  • Provisioning
  • Configuration
  • Version Control for the code
  • Orchestration
  • Deployment
  • Feedback
  • Monitoring

Question: What is CI or Continuous Integration?

Answer: CI or Continuous Integration is the process in which the entire code base is built and compiled every time a code is committed to the shared code repo repository like git. If a team member commits a fault code or a bug, the build fails. In this way, other developers cannot synchronize the codebase without introducing any compilation issues.

If a CI is broken, the team must work together to resolve the problem as soon as possible. The issue can be in a code or unit test or an integration test. It is the developer’s job to fix the broken code from the source code repository.

Question What is Apache Maven?

Answer: Apache Maven is an automation tool that is used for building and compiling Java-based projects. It describes how software is built and its dependencies. It has an XML file called pom.xml which describes the software being built and its dependencies. Furthermore, it also gives information about the external models and their components, their build order, needed plugins, and directories.

Maven downloads the needed Java-based libraries from the Maven 2 Central repository. These downloaded libraries are stored in a local cache that is updated with the artifacts created by local projects.

Question: How do you find out the Kernel version of the Unix-based Operating System?

Answer: We can use the uname -a command to find out the kernel version in the Unix-based OS. This command works in most of the flavors of Linux, Unix, and Mac OSX.

% uname -a
Darwin Nitendras-MBP.lan 20.5.0 Darwin Kernel Version 20.5.0: Sat May  8 05:10:33 PDT 2021; root:xnu-7195.121.3~9/RELEASE_X86_64 x86_64
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