DevOps Interview Questions and Answers
1. What is DevOps?
It is a modern word for IT, a method that underlines both App Developer's and Deployment(Operations) teams collaboration and contact. This relies on quicker distribution and minimized update loss. Technology software production.
2. Which tools are widely used in DevOps?
Widely used tools for DevOps include Jenkins, Nagios, Docker, Ansible, Monit, ELK, Jenkins, and Git.
3. What are the major DevOps components?
Continuous Integration Continuous Delivery Continuous Testing Continuous Monitoring
4. What is Continuous integretion?
The Agile method is a very critical aspect of continuous integration. Developers usually operate on functions or user requirements in a burst and add modifications to the continuous integration repository.
The whole job of developers is combined until the design is applied, and the construction is carried out periodically depending on both check-in and schedules. Continuous integration as a method obliges the project to merge the improvements with others in order to obtain early input.
5. Explain continuous testing?
With the purpose of seamless production in which the program should be distributed to end users, continuous delivery is mostly feasible. Without adequate device monitoring and software training, this can not be done.Therefore, we have to verify that all developers who work as appropriate created and implemented the application.
6. What is Continuous delivery?
Continuous delivery is a continuous integration extension which mainly helps the programmers to just get the activities enjoyed by end customers as soon as humanly possible. During this cycle, the commodity is supplied to the Supply chain via various phases of Quality assurance, Positioning, etc.
7. What does configuration management mean?
The administration of software comprises procedures and different methods for automating procurement and network processes. That is about making the server available for usage as the program is built (example Download device modules, network setup settings).Therefore Operations or device admin will guarantee consistency in different situations by providing the programs. The Chef / Puppet / Ansible resources in this room to simplify above that the described managed services tasks
8. What do you mean by Chef?
It's a versatile tool to turn the network into javascript. You may use written scripts designed by process automation in this method.
9. Why is DevOps so popular?
Today, in the modern market, DevOps is really common and many businesses continue to invest in expertise from DevOps. Any of the major international firms Twitter and Netflix invest in development and technology delivery through DevOps. It supports organizations in their businesses to grow and expand to generate large income. Its popularity remains growing as technology demand rises as most firms begin to adopt DevOps practices, so investing in similar or better development practices, increasing demand, becomes much more essential.
10. What is Puppet? How useful is it?
This is an automatically operated configuration control tool. Puppet uses the wizard / Slave design where both entities communicate via a channel that is authenticated.Many routine tasks, especially the deployment and setup of servers, must be carried out. Writing scripts to automate these activities is an alternative, but when the system becomes huge, it is hectic. Control setup is an ideal way to do so. Puppet facilitates application setup, installation and management. This not only simplifies these repetitive functions, but also reduces a significant portion of the available job period.
11. Name some popular KPIs used in DevOps?
KPIs are primary success metrics that are contractual types. A variety of KPIs may be used to assess the performance of DevOps. Some of the most well known are:Application performance. Availability. Customer tickets. Deployment frequency.Defect escape rate, etc.
12. What are containers?
Containers are a compact virtualisation, and allow separate operations. Items are more bulky but light than that of the hypervisor than a chroot.
13. Explain Version Control System.
VCS is a program designed to document time-saving improvements that have been made to a file or file category. Two of the best recognized version control frameworks are Git and Mercurial. VCS 's major applications are: Test when the last shift triggered a problem was. Measure the period shifts. Identify who and at what time has added a new issue. To any earlier condition, restore a file or data. Restore the whole project to an earlier level.
14. Explain Selenium Grid.
The function for a Selenium Grid is to run similar or slightly separate test cases, but also for the distributed test run on various platforms and browsers. It facilitates experimentation in multiple configurations and provides the opportunity for rescue time.
15. Explain the function of HTTP
In a customer-server relationship like most other applications, HTTP or Hypertext transmission protocol operates. HTTP provides a way of exchanging Hypertext messages from clients to servers to communicate with Internet services.
16. What is the Jenkins/ CI/CD pipeline?
Jenkins pipeline can be described as a set of modules that support the Jenkins continuum pipeline implementation and integration. The design, implementation , evaluation and activation of the continuous integration or distribution system. The work of the pipeline is time consuming. In other terms, a pipeline is a series of clustered and interconnected construction work.
17. Explain the function of Ansible.
Ansible on the server is mounted and SSH allows monitoring of system nodes. Inventories in the operating system determine Nodes' positions. Because Ansible is a cloud - based device, no mandatory deployment on remote nodes is necessary. There is also no need to run context programs when handling nodes. Ansible will use Ansible Playbooks to manage a number of nodes from a single device with an SSH link. Playbooks can perform several activities and are in the style of a YAML script.
18. What are Handlers?
Ansible handlers are much like standard activities within an Ansible Playbook, but they're only executed while a 'notify' command is in effect. If it is required for another mission, handlers are enabled.
19. What does Nagios Log Server mean?
Nagios Log Server makes the scanning process for log data simpler. Nagios Log Server is the right solution for activities like alerting, warning of future risks to log data and quick tracking of every device, etc. Log Server. Users will access all the log details at a single , high accessibility location using Nagios Log Server.
20. Explain Puppet module?
A Puppet Module is merely a set of manipulations and data (for example, details, files and templates). Puppet modules are arranged in a certain tab. We are helpful in organizing the puppet language, because we can break the puppet language into several embodiments with the Puppet module. The usage of the Puppet module to arrange nearly all of the Puppet Manifestos is deemed the best technique.
21. What is a Puppet Manifest?
In Puppet master written in the native puppet language, all the Puppet Nodes or Puppet agents have their configuration information. These descriptions are made up of words Puppet may comprehend and are called Puppet Manifests. These manifests consist of Puppet codes and use the.pp extension for their filetypes.
22. How is AWS helpful in DevOps?
Provides versatile and primed-to-use infrastructure without device download.You may use AWS infrastructure to handle a specific incident or level thousands. AWS helps you to simplify activities and operations, enabling you to create furtherYou may configure account permissions and policies with AWS Identity and Access Control (IAM).AWS supports a broad partner ecosystem which integrates AWS resources and strengthens them.
23. Explain Git Stash.
A developer who deals for a division of the business wants to switch into another region, but the contracting organization does not want to make improvements. Git stash is the answer to this issue. Git stash stores and preserves your changed recorded files on the unfinished modifications list so you can make an application.
24. What is VPC in Devops?
Cloud services require the separation of modules and resources to have fine-grained control over the network plane. There are also parallels between cloud providers' design definitions in general. Yet when you get through the specifics of how different cloud services treat the distinction, there are several fundamental variations. Azure is considered a virtual network (VNet), and the Virtual Private Cloud (VPC) is linked to by AWS and Google Cloud Engine (GCE).
25. How do Kubernetes functions?
A Pod is a module mapping in Kubernetes. Several containers can contain a Pod. Pods have an overlap network structure and connect in flat form to one another, which in principle ensures that every pod inside this integration node will speak to some other Pod.