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DevOps Interview Questions

Define DevOps?

  • DevOps can be defined as a combination of software development practices and tools used for increasing organizations’ ability while delivering applications, services, and more in close alignment with business objectives.

What are the DevOps tools?

  • The most popular DevOps tools are listed below:
    • Git: Version Control System tool
    • Jenkins: Continuous Integration tool
    • Docker: Containerization tool
    • Puppet: Configuration Management and Deployment tools
    • Ansible: Configuration Management and Deployment tool
    • Nagios: Continuous Monitoring tool

What are DevOps components?

  • The following are the key components of DevOps:
    • Continuous Integration
    • Continuous Delivery
    • Microservices
    • Infrastructure as Code
    • Monitoring and Logging
    • Communication and Collaboration

What is AWS DevOps?

  • AWS facilitates essential services that help you implement DevOps at your company and that are built to use in collaboration with AWS.
  • These services automate manual actions, help teams manage complex environments at scale, and keep engineers stable of the high velocity generated by DevOps.

What is the significance of NRPE in Nagios?

  • “Nagios Remote Plugin executor” popularly known as NERP enables us to execute the Nagios plugins remotely.
  • With the help of this mechanism, we can check the performance parameters of the remote Machine.

What is VCS?

  • Version control systems are a kind of software tools which report the changes in the code and integrate these changes with the existing code.
  • As the developer makes changes in the code frequently, these types of tools are helpful in integrating the new code smoothly without disturbing the work of other team members.
  • Along with integration, it will test the new code so that we can avoid the code leading to bugs)

What is Git?

  • Git is a distributed version control system particularly used for recording the changes in the source code during software development.
  • It manages a set of files or a project that change over time. It stores the information in a data structure called the repository.

What is Trunk-Based development?

  • A Trunk-Based development is a source control branching model for software development where developers associate on code in a single branch called trunk and employ documented techniques to create long-lived development branches.
  • This process is called Trunk-Based development.
  • It is a key enabler of continuous integration and by extension continuous delivery.

Why do you need a Continuous Integration of Dev & Testing?

  • Continuous Integration of Dev and Testing improves the quality of software, and reduces the time taken to deliver it, by replacing the traditional practice of testing after completing all development.

What is SubGit?

  • SubGit is an open-source, version control tool for migrating Subversions (SVN) to Git. It allows creating a writable Git mirror of a Subversion repository, which can then be used to push to Git.

What is Ansible?

  • Ansible is an open source automation platform.
  • It is a powerful yet very simple to setup.
  • Ansible facilitates complex tasks like configuration management, IT orchestration, application deployment, and task automation.

What is Jenkins?

  • Jenkins is an open-source continuous integration server that facilitates to achieve a Continuous Integration process in an automated manner.
  • It is also capable to highlight any errors in the project in its early stages.

What is Docker?

  • Docker is a tool to easily create, deploy, and run applications using containers.
  • It packages an application with all its dependencies to ensure its seamless running.
  • Docker allows applications to use the same Linux kernel they are already running on.

What is Sudo in Linux?

  • Sudo or superuser do is a program for Unix and Linux-based Systems.
  • It helps in giving specific users permission to use specific system commands at the root level of the system.

What is “EUCALYPTUS”?

  • “EUCALYPTUS” is the abbreviation for Elastic Utility Computing Architecture for Linking Your Programs to Useful Systems”.
  • It can be used with DevOps tools such as Puppet and Chef.

What is kernel?

  • A kernel is the lowest level of easily replaceable software that interfaces with the hardware in your computer.

What is Scrum?

  • Scrum is basically used to divide your complex software and product development task into smaller chunks, using iterations and incremental practices.
  • Each iteration is of two weeks. Scrum consists of three roles: Product owner, scrum master and Team

What is Puppet?

  • Puppet is a useful project management tool. It helps you to automate administration tasks.

What is CBD?

  • CBD or Component-Based Development is a unique way to approach product development.
  • In this method, developers always look for existing well defined, tested, and verified components to compose and assemble them to a product instead of developing from scratch.