DevOps Interview Questions and Answers Part "B"

In Part "A" We discused ( 1 TO 99 ) Q A now IN PART "B" (100 TO 199)

CLICK HERE FOR PART "A"

Q101) What are the manners in which that a pipeline can be made in Jenkins?

There are two different ways of a pipeline can be made in Jenkins

Scripted Pipelines:

Progressively like a programming approach

Explanatory pipelines:

DSL approach explicitly to make Jenkins pipelines.

The pipeline ought to be made in Jenkins document and the area can either be in SCM or nearby framework.

Definitive and Scripted Pipelines are developed on a very basic level in an unexpected way. Definitive Pipeline is a later element of Jenkins Pipeline which:

gives more extravagant grammatical highlights over Scripted Pipeline language structure, and is intended to make composing and perusing Pipeline code less demanding.

Q102) What are the Labels in Jenkins and where it tends to be used?

Similarly as with CI/CD arrangement should be concentrated , where each application in the association can be worked by a solitary CI/CD server , so in association there might be various types of utilization like java, c#,.NET and so forth, likewise with microservices approach your programming stack is inexactly coupled for the task , so you can have Labeled in every hub and select the choice Only assembled employments while name coordinating this hub, so when a manufacture is planned with the mark of the hub present in it, it hangs tight for next agent in that hub to be accessible, despite the fact that there are different agents in hubs.

Q103) What is the utilization of Blueocean in Jenkins?

Blue Ocean reconsiders the client experience of Jenkins. Planned from the beginning for Jenkins Pipeline, yet at the same time good with free-form occupations, Blue Ocean diminishes mess and builds lucidity for each individual from the group.

It gives complex UI to recognize each phase of the pipeline and better pinpointing for issues and extremely rich Pipeline editorial manager for apprentices.

Q104) What is the callback modules in Ansible, give a few instances of some callback modules?

Callback modules empower adding new practices to Ansible when reacting to occasions. Of course, callback modules control a large portion of the yield you see when running the direction line programs, however can likewise be utilized to include an extra yield, coordinate with different apparatuses and marshall the occasions to a capacity backend. So at whatever point a play is executed and after it creates a few occasions, that occasions are imprinted onto Stdout screen, so callback module can be put into any capacity backend for log preparing.

Model callback modules are ansible-logstash, where each playbook execution is brought by logstash in the JSON group and can be incorporated some other backend source like elasticsearch.

Q105) What are the scripting dialects can be utilized in DevOps?

As with scripting dialects, the fundamental shell scripting is utilized to construct ventures in Jenkins pipelines and python contents can be utilized with some other devices like Ansible , terraform as a wrapper content for some other complex choice unraveling undertakings in any mechanization as python is more unrivaled in complex rationale deduction than shell contents and ruby contents can likewise be utilized as fabricate ventures in Jenkins.

Q106) What is Continuous Monitoring and why checking is basic in DevOps?

DevOps draws out each association capacity of fabricate and discharge cycle to be a lot shorter with an idea of CI/CD, where each change is reflected into generation conditions fastly, so it should be firmly observed to get client input. So the idea of constant checking has been utilized to assess every application execution progressively (at any rate Near Real Time) , where every application is produced with application execution screen specialists perfect and the granular dimension of measurements are taken out like JVM details and even practical savvy measurements inside the application can likewise be spilled out progressively to Agents , which thusly provides for any backend stockpiling and that can be utilized by observing groups in dashboards and cautions to get persistently screen the application.

Q107) Give a few instances of persistent observing instruments?

Where numerous persistent observing instruments are accessible in the market, where utilized for an alternate sort of use and sending model

Docker compartments can be checked by consultant operator, which can be utilized by Elasticsearch to store measurements (or) you can utilize TICK stack (Telegraph, influxdb, Chronograph, Capacitor) for each framework observing in NRT(Near Real Time) and You can utilize Logstash (or) Beats to gather Logs from framework , which thusly can utilize Elasticsearch as Storage Backend can utilize Kibana (or) Grafana as visualizer.

The framework observing should be possible by Nagios and Icinga.

Q108) What is docker swarm?

Gathering of Virtual machines with Docker Engine can be grouped and kept up as a solitary framework and the assets likewise being shared by the compartments and docker swarm ace calendars the docker holder in any of the machines under the bunch as indicated by asset accessibility

Docker swarm init can be utilized to start docker swarm bunch and docker swarm joins with the ace IP from customer joins the hub into the swarm group.

Q109) What are Microservices, and how they control productive DevOps rehearses?

Where In conventional engineering , each application is stone monument application implies that anything is created by a gathering of designers, where it has been conveyed as a solitary application in numerous machines and presented to external world utilizing load balancers, where the microservices implies separating your application into little pieces, where each piece serves the diverse capacities expected to finish a solitary exchange and by separating , engineers can likewise be shaped to gatherings and each bit of utilization may pursue distinctive rules for proficient advancement stage, on account of light-footed improvement ought to be staged up a bit and each administration utilizes REST API (or) Message lines to impart between another administration.

So manufacture and arrival of a non-hearty variant may not influence entire design, rather, some usefulness is lost, that gives the affirmation to proficient and quicker CI/CD pipelines and DevOps Practices.

Q110) What are the manners in which that a pipeline can be made in Jenkins?

There are two different ways of a pipeline can be made in Jenkins

Scripted Pipelines:

Progressively like a programming approach

Explanatory pipelines:

DSL approach explicitly to make Jenkins pipelines.

The pipeline ought to be made in Jenkins record and the area can either be in SCM or neighborhood framework.

Definitive and Scripted Pipelines are developed in a general sense in an unexpected way. Explanatory Pipeline is a later element of Jenkins Pipeline which:

gives more extravagant linguistic highlights over Scripted Pipeline sentence structure, and is intended to make composing and perusing Pipeline code simpler.

Q111) What are the Labels in Jenkins and where it very well may be used?

Likewise with CI/CD arrangement should be incorporated , where each application in the association can be worked by a solitary CI/CD server , so in association there might be various types of use like java, c#,.NET and so forth, similarly as with microservices approach your programming stack is inexactly coupled for the undertaking , so you can have Labeled in every hub and select the alternative Only assembled occupations while mark coordinating this hub, so when a fabricate is booked with the name of the hub present in it, it sits tight for next agent in that hub to be accessible, despite the fact that there are different agents in hubs.

Q112) What is the utilization of Blueocean in Jenkins?

Blue Ocean reexamines the client experience of Jenkins. Planned starting from the earliest stage for Jenkins Pipeline, yet at the same time good with free-form occupations, Blue Ocean lessens mess and expands clearness for each individual from the group.

It gives modern UI to recognize each phase of the pipeline and better pinpointing for issues and rich Pipeline proofreader for fledglings.

Q113) What is the callback modules in ansible, give a few instances of some callback modules?

Callback modules empower adding new practices to Ansible when reacting to occasions. As a matter of course, callback modules control the greater part of the yield you see when running the direction line programs, yet can likewise be utilized to include an extra yield, coordinate with different instruments and marshall the occasions to a capacity backend. So at whatever point a play is executed and after it delivers a few occasions, that occasions are imprinted onto Stdout screen, so callback module can be put into any capacity backend for log handling.

Precedent callback modules are ansible-logstash, where each playbook execution is gotten by logstash in the JSON position and can be incorporated some other backend source like elasticsearch.

Q114) What are the scripting dialects can be utilized in DevOps?

As with scripting dialects, the fundamental shell scripting is utilized to assemble ventures in Jenkins pipelines and python contents can be utilized with some other instruments like Ansible.

Q115) For what reason is each instrument in DevOps is generally has some DSL (Domain Specific Language)?

Devops is a culture created to address the necessities of lithe procedure, where the advancement rate is quicker ,so sending should coordinate its speed and that needs activities group to arrange and work with dev group, where everything can computerize utilizing content based , however it feels more like tasks group than , it gives chaotic association of any pipelines, more the utilization cases , more the contents should be composed , so there are a few use cases, which will be sufficient to cover the requirements of light-footed are taken and apparatuses are made by that and customization can occur over the device utilizing DSL to mechanize the DevOps practice and Infra the board.

Q116) What are the mists can be incorporated with Jenkins and what are the utilization cases?

Jenkins can be coordinated with various cloud suppliers for various use cases like dynamic Jenkins slaves, Deploy to cloud conditions.

A portion of the cloud can be incorporated are

AWS
Purplish blue
Google Cloud
OpenStack

Q117) What are Docker volumes and what sort of volume ought to be utilized to accomplish relentless capacity?

Docker volumes are the filesystem mount focuses made by client for a compartment or a volume can be utilized by numerous holders, and there are distinctive sorts of volume mount accessible void dir, Post mount, AWS upheld lbs volume, Azure volume, Google Cloud (or) even NFS, CIFS filesystems, so a volume ought to be mounted to any of the outer drives to accomplish determined capacity, in light of the fact that a lifetime of records inside compartment, is as yet the holder is available and if holder is erased, the information would be lost.

Q118) What are the Artifacts store can be incorporated with Jenkins?

Any sort of Artifacts vault can be coordinated with Jenkins, utilizing either shell directions (or) devoted modules, some of them are Nexus, Jfrog.

Q119) What are a portion of the testing apparatuses that can be coordinated with Jenkins and notice their modules?

Sonar module – can be utilized to incorporate testing of Code quality in your source code.

Execution module – this can be utilized to incorporate JMeter execution testing.

Junit – to distribute unit test reports.

Selenium module – can be utilized to incorporate with selenium for computerization testing.

Q120) What are the manufacture triggers accessible in Jenkins?

Fabricates can be run physically (or) either can naturally be activated by various sources like

Webhooks- The webhooks are API calls from SCM, at whatever point a code is submitted into a vault (or) should be possible for explicit occasions into explicit branches.

Gerrit code survey trigger-Gerrit is an opensource code audit instrument, at whatever point a code change is endorsed after audit construct can be activated.

Trigger Build Remotely – You can have remote contents in any machine (or) even AWS lambda capacities (or) make a post demand to trigger forms in Jenkins.

Calendar Jobs-Jobs can likewise be booked like Cron occupations.

Survey SCM for changes – Where your Jenkins searches for any progressions in SCM for the given interim, if there is a change, a manufacture can be activated.

Upstream and Downstream Jobs-Where a construct can be activated by another activity that is executed already.

Q121) How to Version control Docker pictures?

Docker pictures can be form controlled utilizing Tags, where you can relegate the tag to any picture utilizing docker tag <image-id> order. Furthermore, on the off chance that you are pushing any docker center library without labeling the default label would be doled out which is most recent, regardless of whether a picture with the most recent is available, it indicates that picture without the tag and reassign that to the most recent push picture.

Q122) What is the utilization of Timestamper module in Jenkins?

It adds Timestamp to each line to the comfort yield of the assemble.

Q123) Why you ought not execute an expand on ace?

You can run an expand on ace in Jenkins , yet it isn’t prudent, in light of the fact that the ace as of now has the duty of planning assembles and getting incorporate yields with JENKINS_HOME index, so on the off chance that we run an expand on Jenkins ace, at that point it furthermore needs to manufacture apparatuses, and workspace for source code, so it puts execution over-burden in the framework, if the Jenkins ace accidents, it expands the downtime of your fabricate and discharge cycle.

Q124) What do the main benefits of DevOps?

With a single team composed of cross-functional comments simply working in collaboration, DevOps organizations container produce including maximum speed, functionality, including innovation. Where continue special benefits: Continuous software control. Shorter complexity to manage.

Q125) What are the uses of DevOps tools?

Gradle. Your DevOps device stack will need a reliable build tool.
Git. Git is one from the most successful DevOps tools, widely applied across the specific software industry.
Jenkins. Jenkins is that go-to DevOps automation tool for many software community teams.
Bamboo.
Docker.
Kubernetes.
Puppet Enterprise.
Ansible.

Q126) What is DevOps beginner?

DevOps is a society which supports collaboration between Development including Operations Team to deploy key to increase faster in an automated & repeatable way. In innocent words, DevOps backside is established as an association of development and IT operations including excellent communication and collaboration.

Q127) What is the roles and responsibilities of the DevOps engineer?

DevOps Engineer manages with developers including the IT system to manage the code releases. They are both developers cases become interested in deployment including practice settings or sysadmins who convert a passion for scripting and coding more move toward the development front where all can improve that planning from test and deployment.

Q128) Which is the top DevOps tools? and it’s Which tools have you worked on?

Discover about the trending Top DevOps Tools including Git. Well, if you live considering DevOps being a tool when, you are wrong! DevOps does not a tool or software, it’s an appreciation that you can adopt for continuous growth. file and, by practicing it you can simply coordinate this work among your team.

Q129) Explain the typical characters involved in DevOps?

Commitment to the superior level in the organization.
Need for silver to be delivered across the organization.
Version check software.
Automated tools to compliance to process.
Automated Testing
Automated Deployment

Q130) What are your expectations from a career perspective of DevOps?

To be involved in the end to end delivery method and the most important phase of helping to change the manner so as to allow that development and operations teams to go together also understand each other’s point of view.

Q131) What does configuration management under terms like infrastructure further review some popular tools used?

In Software Engineering Software Configuration Management is a unique task about tracking to make the setting configuration during the infrastructure with one change. It is done for deploying, configuring and maintaining servers.

Q132) How will you approach when each design must to implement DevOps?

As the application is generated and deployed, we do need to control its performance. Monitoring means also really important because it might further to uncover some defects which might not have been detected earlier.

Q133) Explain about from Continuous Testing

From the above goal of Continuous Integration which is to take this application excuse to close users are primarily providing continuous delivery. This backside is completed out any adequate number about unit testing and automation testing. Hence, we must validate that this system created and integrated with all the developers that work as required.

Q134) Explain about from Continuous Delivery.

Continuous Delivery means an extension of Constant Integration which primarily serves to make the features which some developers continue developing out on some end users because soon as possible. During this process, it passes through several stages of QA, Staging etc., and before for delivery to the PRODUCTION system.

Q135) What are the tasks also responsibilities of DevOps engineer?

In this role, you’ll work collaboratively including software engineering to use and operate our systems. Help automate also streamline our procedures and processes. Build also maintain tools for deployment, monitoring, including operations. And troubleshoot and resolve problems in our dev, search and production environments.

Q136) What is defined DevOps engineer should know?

DevOps Engineer goes including developers and that IT staff to manage this code releases. They live both developers who become involved through deployment including web services or sysadmins that become a passion for scripting and coding more move into the development design where only can develop this planning from search also deployment.

Q137) How much makes any DevOps engineer make?

A lead DevOps engineer can get between $137,000 including $180,000, according to April 2018 job data of Glassdoor. The common salary from any lead DevOps engineer based at the Big Apple is $141,452.

Q138) What mean the specific skills required for a DevOps engineer?

While tech abilities are a must, strong DevOps engineers further possess this ability to collaborate, multi-task, also always place that customer first. critical skills that all DevOps engineer requirements for success.

Q139) What is DevOps also why is it important?

Implementing the new approach would take in many advantages on an organization. A seamless collection up can be performed in the teams of developers, test managers, and operational executives also hence they can work in collaboration including each other to achieve a greater output on a project.

Q140) What is means by DevOps lifecycle?

DevOps means an agile connection between development including operations. It means any process followed by this development because well because of help drivers clean of this starting of this design to production support. Understanding DevOps means incomplete excuse estimated DevOps lifecycle.

Tools for an efficient DevOps workflow. A daily workflow based at DevOps thoughts allows team members to achieve content faster, be flexible just to both experiments also deliver value, also help each part from this organization use a learning mentality.

Q142) Can you make DevOps without agile?

DevOps is one about some key elements to assist you to achieve this. Can you do agile software evolution without doing DevOps But managing agile software development and being agile are a couple really different things.

Q143) What exactly defined is DevOps?

DevOps is all of bringing commonly the structure also process of traditional operations, so being support deployment, including any tools, also practices of traditional construction methods so as source control also versioning.

Q144) Need for Continuous Integration:

Improves the quality of software.
Reduction in time taken to delivery
Allows dev team to detect and locate problems early

Q145) Success factor for the Continuous Integration

Maintain Code Repository
Automate the build
Perform daily checkin and commits to baseline
Test in clone environment
Keep the build fast
Make it easy to get the newest deliverables

Q146) Can we copy Jenkins job from one server to other server?

Yes, we can do that using one of the following ways

We can copy the Jenkins jobs from one server to other server by copying the corresponding jobs folder.
We can make a copy of the existing job by making clone of a job directory with different names
Rename the existing job by renaming the directory

Q147) How can we create the backup and copy in Jenkins?

We can copy or backup, we need to backup JENKINS_HOME directory which contains the details of all the job configurations, build details etc.

Q148) Difference between “poll scm” and “build periodically”

Poll SCM will trigger the build only if it detects the change in SCM, whereas Build Periodically will trigger the build once the given time period is elapsed.

Q149) What is difference between docker image and docker container?

Docker image is a readonly template that contains the instructions for a container to start.

Docker container is a runnable instance of a docker image

Q150) What is Application Containerization?

It is a process of OS Level virtualization technique used to deploy the application without launching the entire VM for each application where multiple isolated applications or services can access the same Host and run on the same OS.

Q151) syntax for building docker image

docker build –f <filename> -t imagename:version

Q152) running docker image

docker run –dt –restart=always –p <hostport>:<containerport> -h <hostname> -v <hostvolume>:<containervolume> imagename:version

Q153) How to log into a container

docker exec –it <containerID> /bin/bash

Q154) What is Puppet?

Puppet is a Configuration Management tool, Puppet is used to automate administration tasks.

Q155) What is Configuration Management?

Configuration Management is the System engineering process. Configuration Management applied over the life cycle of a system provides visibility and control of its performance, functional, and physical attributesrecording their status and in support of Change Management.

Q156) List the Software Configuration Management Features.

Enforcement
Cooperating Enablement
Version Control Friendly
Enable Change Control Processes

Q157) List out the 5 Best Software Configuration Management Tools.

CFEngine Configuration Tool.
CHEF Configuration Tool
Ansible Configuration Tool
Puppet Configuration Tool.
SALTSTACK Configuration Tool.

Q158) Why should Puppet be chosen?

It has good community support
Easy to Learn Programming Language DSL
It is open source

Q159) What is Saltstack?

SaltStack is based on Python programming & Scripiting language. Its also a configuration tool.Saltstack works on a non-centralized model or a master-client setup model. it provides a push and SSH methods to communicate with clients.

Q160) Why should Puppet to be chosen?

There are Some Reason puppet to be chosen.

Puppet is open source
Easy to Learn Programming Language DSL
Puppet has good community support

Q161) Advantages of VCS

Multiple people can work on the same project and it helps us to keep track of the files and documents and their changes.
We can merge the changes from multiple developers to single stream.
Helps us to revert to the earlier version if the current version is broke.
Helps us to maintain multiple version of the software at the same location without rewriting.

Q162) Advantages of DevOps

Below are the major advantages

Technical:

Continuous software delivery
Less Complexity
Faster Resolution

Business:

Faster delivery of the features
More stable operating environment
Improved communication and collaboration between various teams

Q163) Use cases where we can use DevOps

Explain the legacy / old procedures that are followed to develop and deploy software
Problems of that approach
How can we solve the above issues using DevOps.

For the 1st and 2nd points, development of the application, problems in build and deployment, problems in operations, problems in debugging and fixing the issues

For 3rd point explain various technologies we can use to ease the deployments, for development, explain about taking small features and development, how it helps for testing and issue fixing.

Q164) Major difference between Agile and DevOps

Agile is the set of rules/principles and guidelines about how to develop a software. There are chances that this developed software works only on developer’s environment. But to release that software to public consumption and deploy in production environment, we will use the DevOps tools and Techniques for the operation of that software.

In a nutshell, Agile is the set of rules for the development of a software, but DevOps focus more on Development as well as Operation of the Developed software in various environments.

Q165) What Are the Benefits Of Nosql?

Non-relationals and schema-less data models
Low latency and high performance
Highly scalable

Q166) What Are Adoptions Of Devops In Industry?

Use of the agile and other development processes and methods.
Demand for an increased rate of the production releases from application and business.
Wide availability of virtuals and cloud infrastructure from both internal and external providers;
Increased usage of the data center ,automation and configuration management tools;
Increased focus on the test automation and continuous integration methods;
Best practices on the critical issues.

Q167) How Is the Chef Used As a Cm Tool ?

Chef is the considered to be one of the preferred industry-wide CM tools. Facebook migrated its an infrastructure and backend IT to the Chef platform, for example. Explain how to the Chef helps you to avoid delays by automating processes. The scripts are written in Ruby. It can integrate with a cloud-based platforms and configure new systems. It provides many libraries for the infrastructure development that can later to be deployed within a software. Thanks to its centralized management system, one of the Chef server is enough to be used as the center for deploying various policies.

Q168) Why Are the Configuration Management Processes And Tools Important ?

Talk about to multiple software builds, releases, revisions, and versions for each other software or testware that is being developed. Move on to explain the need for storing and maintaining data, keeping track of the development builds and simplified troubleshooting. Don’t forget to mention that key CM tools that can be used to the achieve these objectives. Talk about how to tools like Puppet, Ansible, and Chef help in automating software deployment and configuration on several servers.

Q169) Which Are the Some Of the Most Popular Devops Tools ?

The most popular DevOps tools included`

Selenium
Puppet
Chef
Git
Jenkins
Ansible

Q170) What Are the Vagrant And Its Uses?

Vagrant used to virtual box as the hypervisor for virtual environments and in current scenario it is also supporting the KVM. Kernel-based Virtual Machine.

Vagrant is a tool that can created and managed environments for the testing and developing software. Devops Training Free Demo

Q171) How to Devops Is Helpful To Developers ?

To fix the bug and implements new features of the quickly. It provides to the clarity of communications among team members.

Q172) Name of The Popular Scripting Language Of the Devops ?

Python

Q173) List of The Agile Methodology Of the Devops?

DevOps is a process
Agile is the same as DevOps.
Separate group are framed.
It is problem solving.
Developers managing production
DevOps is the development-driven release management

Q174) Which Are The Areas of Devops Are Implemented?

Production Development
Creation of the productions feedback and its development
IT Operations development

Q175) The Scope For SSH ?

SSH is a Secure Shell which provides users with a secure, encrypted mechanism to log into systems and transfer files.
To log out the remote machine and worked on command line.
To secure encrypted of the communications between two hosts over an insecure network.

Q176) What Are The Advantages Of Devops With Respect To the Technical And Business Perspective?

Technical benefits

Software delivery is continuous.
Reduces Complexity in problems.
Faster approach to resolve problems
Manpower is reduced.

Business benefits

High rate of delivering its features
Stable operating environments
More time gained to Add values.
Enabling faster feature time to market

Q177) What Are The Core Operations Of the Devops In Terms Of the Development And Infrastructure ?

The core operations of DevOps

Application development
Code developing
Code coverage
Unit testing
Packaging
Deployment With infrastructure
Provisioning
Configuration
Orchestration
Deployment

Q178) What Are The Anti-patterns Of Devops?

A pattern is common usage usually followed. If a pattern of thecommonly adopted by others does not work for your organization and you continue to blindly follow it, you are essentially adopting an anti-pattern. There are myths about DevOps.

Some of them include

DevOps is a process
Agile equals DevOps
We need a separate DevOps group
Devops will solve all our problems
DevOps means Developers Managing Production
DevOps is Development-driven release management
DevOps is not development driven.
DevOps is not IT Operations driven.
We can’t do DevOps – We’re Unique
We can’t do DevOps – We’re got the wrong people

Q179) What are The Most Important Thing Devops Helps Us Achieve?

The most important thing that the DevOps helps us achieve is to get the changes into production as quickly as possible while that minimizing risks in software quality assurance and compliance. This is the primary objective of DevOps.

For example clear communication and better working relationships between teams i.e. both of the Ops team and Dev team collaborate together to deliver good quality software which in turn leads to higher customer satisfaction.

Q180) How Can Make a Sure New Service Is Ready For The Products Launched?

Backup System
Recovery plans
Load Balancing
Monitoring
Centralized logging
Q181) How to All These Tools Work for Together?
- Given below is a generic logical of the flow where everything gets are automated for seamless delivery. However, its flow may vary from organization to the organization as per the requirement.
- Developers develop the code and this source code is managed by Version Control System of the tools like Git etc.
- Developers send to this code of the Git repository and any changes made in the code is committed to this Repository.
- Jenkins pulls this code from the repository using the Git plugin and build it using tools like Ant or Maven.
- Configuration managements tools like puppet deploys & provisions testing environment and then Jenkins releases this code on the test to environment on which testing is done using tools like selenium.
- Once the code are tested, Jenkins send it for the deployment on production to the server (even production server are provisioned & maintained by tools like puppet).
- After deployment Its continuously monitored by tools like Nagios.
- Docker containers provides testing environment to the test the build features.
Q182) Which Are The Top Devops Tools?

The most popular DevOps tools are mentioned below
- Git Version Control System tool
- Jenkins Continuous Integration tool
- Selenium Continuous Testing tool
- Puppet, Chef, Ansible are Configuration Management and Deployment tools
- Nagios Continuous Monitoring tool
- Docker Containerization tool
Q183) How to Devops Different From the Agile / Sdlc?

Agile are the set of the values and principles about how to produce i.e. develop software.

Example if you have some ideas and you want to the turn those ideas into the working software, you can use the Agile values are principles as a way to do that. But, that software might only be working on developer’s laptop or in a test environment. You want a way to quickly, easily and repeatably move that software into the production infrastructure, in a safe and simple way. To do that you needs are DevOps tools and techniques.

You can summarize by saying Agile of the software development methodology focuses on the development for software but DevOps on the other hand is responsible for the development as well as deployment of the software to the safest and most reliable way to the possible. Here’s a blog that will give you more information of the evolutions of the DevOps.

Q184) What Is The Need For Devops?

According to me, this should start by explaining the general market trend. Instead of the releasing big sets of the features, companies are trying to see if small features can be transported to their customers through a series of the release trains. This have many advantages like quick feedback from the customers, better quality of the software etc. which in turn leads to the high customer satisfaction.

To achieve this, companies are required to
- Increase deployment frequency
- Lower failure rate of new releases
- Shortened lead time between fixes
- Faster mean time to recovery of the event of new release crashing
Q185) What is meant by Continuous Integration?

It’s the development practice that requires developers to integrate code into a shared repository several times a day. Each check-in then verified by an automated build, allowing teams to the detect problems early.

Q186) Mention some of the useful plugins in Jenkins.

Below, I have mentioned some important are Plugins:
- Maven 2 project
- Amazon EC2
- HTML publisher
- Copy artifact
- Join
- Green Balls
Q187) What is Version control?

Its the system that records changes are the file or set of the files over time so that you can recall specific versions later.

Q188) What are the uses of Version control ?

Revert files back to a previous state. Revert to the entire project back to a previous state.

Compare changes over time.

See who last modified the something that might to be causing a problem.

Who introduced an issue and when.

Q189) What are the containers?

Containers are the of lightweight virtualization, heavier than ‘chroot’ but lighter than ‘hypervisors’. They provide isolation among processes

Q190) What is meant by Continuous Integration?

It is a development practice that requires are developers to integrate code into the shared repository several times a day.

Q191) What’s a PTR in DNS?

Pointer (PTR) record to used for the revers DNS (Domain Name System) lookup.

Q192) What testing is necessary to insure a new service is ready for production?

Continuous testing

Q193) What is Continuous Testing?

It is the process of executing on tests as part of the software delivery pipelines to obtain can immediate for feedback is the business of the risks associated with in the latest build.

Q194) What is Automation Testing?

Automation testing or Test Automation is a process of the automating that manual process to test the application/system under test.

Q195) What are the key elements of continuous testing?

Risk assessments, policy analysis, requirements traceabilities, advanced analysis, test optimisation, and service virtualisations

Q196) What are the Testing types supported by Selenium?

Regression testing and functional testing

Also Read>> Top Selenium Interview Questions & Answers

Q197) What is Puppet?

It is a Configuration Management tool which is used to the automate administration of the tasks.

Q198) How does HTTP work?

The HTTP protocol are 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 servers software which are the responds to that request is called a server. World Wide Web Consortium of the Internet Engineering Task Force are two importants spokes are the standardization of the HTTP protocol.

Q199) Describe two-factor authentication?

Two-factors authentication are the security process in which the user to provides two means of the identification from separate categories of credentials.

Q200) What is git add?

adds the file changes to the staging area.