Top DevOps Interview Questions – Most Asked
Top Answers to DevOps Interview Questions
|Basic premise||Agile, lean, collaboration of IT development and operations which is more of a cultural shift|
|Related to||Agile methodology|
|Priorities||Resource management, communication and teamwork|
|Benefits||Speed, functionality, stability and innovation|
The core operations of DevOps are: application development, code developing, code coverage, unit testing, packaging, deployment with infrastructure, provisioning, configuration, orchestration, and deployment.
DevOps can be considered complementary to the agile methodology, but not completely similar.
Some of the common tools are – Docker, Git, Selenium, Puppet, Nagios and Chef
It is a system that records changes to a file or set of files over time so that you can recall specific versions later.
- Revert files back to a previous state.
- Revert the entire project back to a previous state.
- Compare changes over time.
- See who last modified something that might be causing a problem.
- Who introduced an issue and when.
Containers are form of lightweight virtualization, heavier than ‘chroot’ but lighter than ‘hypervisors’. They provide isolation among processes
It is practice of delivering the software for testing as soon as it is built by CI (Continuous Integration) servers.
Git is a Distributed Version Control system (DVCS). It can track changes to a file and allows you to revert back to any particular change.
It can be done in two ways:
By removing or fixing the bad file in a new commit and pushing it to the remote repository. Once the necessary changes to the file has been made, commit it to the remote repository. Use: git commit -m “commit message”
By creating a new commit that undoes all changes that were made in the bad commit. To do this, use command: git revert <name of bad commit>
Git bisect is used to find the commit that introduced a bug by using binary search.
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.
Vagrant is a tool that can create and manage virtualized (or containerized) environments for testing and developing software.
It is done to discuss what went wrong and what steps should be taken so that failure doesn’t happen again.
It is a development practice that requires developers to integrate code into a shared repository several times a day.
Pointer (PTR) record is used for revers DNS (Domain Name System) lookup.
Continuous Testing is the process of executing automated tests as part of the software delivery pipeline to obtain immediate feedback on the business risks associated with in the latest build.
Automation testing or Test Automation is a process of automating the manual process to test the application/system under test.
Risk assessment, policy analysis, requirements traceability, advanced analysis, test optimisation, and service virtualisation
Regression testing and functional testing
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Asset Management, broadly defined, refers to any system that monitors and maintains things of value to an entity or group.
Configuration Management is the process of planning for, identifying, controlling and verifying the Configurations Items (CIs) within a service, recording their status and, in support of Change Management, assessing the potential IT impact of changing those items.
It is a Configuration Management tool which is used to automate administration tasks.
The HTTP protocol works in a client and server model like most other protocols. A web browser using which a request is initiated is called as a client and a web server software which responds to that request is called a server. World Wide Web Consortium and the Internet Engineering Task Force are two important spokes in the standardization of the HTTP protocol.
Two-factor authentication is a security process in which the user provides two means of identification from separate categories of credentials;