Most frequently asked Jenkins interview Questions

Jenkins interview Questions

 list of the most frequently asked interview questions:

Q1. What is a Jenkins?

Jenkins is open source automation tool written in the Java with plugins built for Continuous Integration-purpose. Jenkins used to build and test  software projects.continuously making  easier for developers to integrate changes to project, and making it easier for the users to obtain a fresh build. It also allows  to continuously deliver your software by integrating with  large number of testing and deployment of technologies.

● First,  developer commits the code to  source code repository. Meanwhile,
Jenkins server checks  repository at regular time intervals for changes.
● Soon after commit occurs, the Jenkins server detects changes that have
occurred in  source code repository. Jenkins will pull those changes ,will
start preparing a new build.
● If the build fails, then  concerned team will be notified.
● If built  successful, then Jenkins deploys  built in the test server.
● After testing, Jenkins generates a feedback  then notifies  developers about
build and the test results.
● It will continue to check  source code repository for the changes made in t
source code and then whole process keeps on repeating.

Q2. Discuss benefits of using Jenkins?

● At the  integration stage, build failures are cached.
● For eachand every  change in the source code an automatic build report notification is
● To notify  the developer about build report success or failure, it is integrated with the LDAPmail server.
● Achieves continuous integration with agile development and test driven development.
● With the simple steps, maven release project is automated regularly.
● Easy tracking of the bugs at early stage in development environment than production.

Q3. What are  pre-requisites for using the Jenkins

● source code repository  is accessible, for instance,  Git repository.
● working build script, like  Maven script, checked into the repository.

Q4. List some of the useful plugins in Jenkins?

Below are some of important Plugins:
● Maven 2 project
● Amazon EC2 , HTML publisher
● Copy artifact
● Join
● Green Balls

Q5.  what are the commands  used to start Jenkins

To start Jenkins  open Console or Command line, then go to  Jenkins
installation-directory. Over there you can use  below commands:

1. start Jenkins: jenkins.exe start
2. stop Jenkins: jenkins.exe stop
3. restart Jenkins: jenkins.exe restart

Q6. Explain how  to set up Jenkins job?

First mention how to create Jenkins job.
1.Go to Jenkins top page and select “New Job”, next  choose “Build free-style softwareproject”.
Elements of this freestyle job:
● Optional SCM, such as CVS / Subversion where your source code resides.
● Optional triggers the control when Jenkins will performs build.
● Some sort of the build script that performs the build like ant, maven/shell script, batch and file . where the real work starts.
● Optional steps to collect  the information out of  build, such as archiving the artifacts
and/or recording javadoc and test results.
● There other Optionas  to notify other people/systems with the build result, such as sending
e-mails, IMs, updating issue tracker, etc..

Q7. Explain how to create a backup and copy files in Jenkins?

To create backup  you need to do is periodically back up your JENKINS_HOME directory. This contains all of your build jobs configurations, your slave node
configurations, your build history. To create  back-up of your Jenkins setup, copy this directory. You can also copy  job directory to clone or replicate  job or rename  directory.

Q8. How to secure Jenkins?

● Ensure that global security is on.
● Ensure Jenkins is integrated with the  company’s user directory with
the appropriate plugin.
● Ensure  matrix/Project matrix is enabled to fine tune access.
● Automate process of setting rights or privileges in Jenkins with the custom version of controlled script.
● Limit physical access to the Jenkins data/folders.
● Periodically run the security audits on same.

Q9 Explain how you can we deploy a custom build of core plugin?

Below are steps to deploy custom build of the core plugin:
● Stop the Jenkins.
● Copy  custom HPI to the $Jenkins_Home/plugins.
● Delete e previously expanded plugin directory.
● Make an empty file called as .hpi.pinned.
● Start the Jenkins.

Q10. Explain  relation between Hudson and Jenkins?

Hudson was  the earlier name and version of  current Jenkins. After
some issue, project name changed from Hudson to Jenkins.

Q11. What  do you do when you see  the  broken build for your project ?

Open  the console output for  the broken build and try to see if any file changes  missed. If  unable to find the issue in that way, then  clean and updatelocal workspace to replicate problem and try to solve it.

Q12. Explain how  to  move or copy Jenkins from one server to other server?

There are multiple ways :

● Move the job from one installation of the  Jenkins to the another by simply copying corresponding job directory.
● Make copy of  existing job.
● Rename existing job by renaming  directory. Note that if you change  job
name you will need to change other job that tries to call the renamed job.

Q13. Mention various ways which build can be scheduled in the 

● By following source code management commits
● After the completion of other builds
● Can scheduled to run at specified time slots
● Manual Build up Requests.

Q14.Differentiate between  Ant , Maven and Jenkins?

Ant  and Maven are Build Technologies where as the  Jenkins is  continuous integration tool.

Q15. list  SCM tools  that Jenkins supports?

Below are the Source code management tools supported by the Jenkins:
● AccuRev
● CVS,
● Subversion,
● Git,
● Mercurial,
● Perforce,
● Clearcase

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Most frequently asked AWS interview questions


AWS provides various range of cloud-based services like analytics, computing power, storage,content delivery, machine learning , databases,   and more. It is the most popular leading cloud providers globally and is widely used by    startups,businesses, governments, and  also individuals.

1.How to change the key pair for ec2 instance?

2.How to change the ec2 instance from one zone to another zone &one region to another region?

3.Explain SNS?

4.Is it possible to reset windows password using AWS?

5.How to perform Horizontal  and Vertical Auto Scaling?

6.How to  back up  your ec2 instance?

7.How to create Cloud Formation in templates for automatic instance  creation & termination?

8.Steps to restore  data from an Amazon RDS?

9.procedure to connect  Linux instance using user name  and password?

10.How to enable MFA of IAM account?

11.How to create application load balancer for the  host based and path based routing?

12.How to enable the load balancer to auto scaling groups?

13.How to  establish push  and pull Docker images to ECR?

14.How to create the ECS services connect to application load balancer?

15.Explain steps to  create the IAM rules and permission from console and command line?

16.Explain  enabling  cloud watch metrics, alerts and notifications?

17.Procedure to enable cloud trail event for multi zones?

18.Procedure  to deploy  PHP based application with the RDS and high availability in elastic beanstalk?

19.Describe how to run python based lambda function?

20.Explain  enabling VPN access on premises cloud?

21.Steps to enable web application to  firewall and shield for your website?

22.Explain configuring cloud front and provide the edge points and edge servers for content distribution?

23.Describr how to migrate VM to AWS?

24.How to migrate database -> RDS?

25.How to run the code pipeline?

26.How to integrate the cloud formation template deploy from code pipeline / GitHub and Jenkins?

27.Procedure to integrate the Jenkins with aws ec2 instance?

28.How to Enable lambda functions  for Load Balancers?

29.List types of ELB S in AWS?

30.Describe Auto Scaling policies?

31.What is pre-requisites for ec2 VPC peering?

32.Differences between NAT instance and NAT gateway?

33.Differences between  INTERNET gateway and NAT gate way ?

34.Explain route table?

35.What are the default route table contents?

36.Explain how to rotate keys automatically?Deploy code from code deploy to ECS container?

37.What is the Code Star?

38.Explain  X-ray?

39.What is Cloud 9?

40.What is the Glacier?

41.What is the Snowball?

42.What is the AWS Fargate?

43.What is the AWS Serve less Deployment?

44.Expalin  On-demand Instance, Spot Instance, and Reserved Instance different from each another?

45.Why do we make subnets?

46.Describe  internet gateway?

For more Aws related interview questions  and to learn AWS from professiona

Artificial Intelligence Interview Questions

LIST OF  Artificial Intelligence Interview Questions

1.LIST Common Uses and Applications of Artificial Intelligence?

Possibilities include  object detection,contract analysis and classification for  navigation and avoidance , image recognition, content- distribution, predictive maintenance, data processing, automation of manual tasks, and data driven reporting.

2. What are Intelligent Agents? How  They  are used in AI?

Intelligent agents are the autonomous entities that uses sensor to know what is going on, and  use actuators to perform their tasks/ goals. They can be complex  or simple and can be programmed to accomplish their jobs better.

3. What is meant by Tensorflow, and What is Tensorflow  Used For?

Tensorflow is  open-source software library  was initially developed by  Google Brain Team to use in  neural networks research and machine learning . It is used for  the data-flow programming.  Using Tensor Flow   to build the certain AI features into applications become easier, including operations like  speech recognition and Natural language processing.

4. What is meant by  Machine Learning, and How can It Relate to AI?

Machine learning is  subset of AI. The idea  of machine learning is machines will “learn” and get better at tasks over  the time rather than having humans  to input parameters. Machine learning is  more practical application of AI.

5. Describe Neural Networks and How  they Relate to AI?

Neural networks are the  class of machine learning algorithms. They are   part of the neural   computational component, and their network part is how the neurons are being connected with. Neural networks pass  data among them, gathering more and more as the data moves in and along. Because  the networks are interconnected with more complex data ,which  can process more efficiently.

6. What is Deep Learning? Does It Relate to AI?

Deep learning can be explined as subset of the machine learning. Refers to  multi-layered neural networks to process the data in increasingly  ways, enabling  software to guide  itself to perform task like image  and speech recognitions through exposure to numerous amounts of data for continual improvement  to recognize and process information. Layers of the neural networks stacked up  on the top of each for use in   deep learning are called deep neural networks.

7. Why Image Recognition is a Key Function of AI?

Humans are visual, and AI  designed to emulate human brains. Teaching machines to recognize and categorize images is  crucial part of AI. Image recognition also helps the machines to learn  because the more images that are processed, are the better the software gets  recognizing and processing those images.

8. What is meant by Automatic Programming?

Automatic programming  describing what can a program should do, and  having the AI system “write” the program.

9. What is a Bayesian Network, and How Does Bayesian  Relate to AI?

A Bayesian network is graphical model for the probabilistic relationships among a set of variables. Alsomimics the human brain in processing various  variables.

10. What are the Constraint Satisfaction Problems?

Constraint Satisfaction Problems (CSPs) are the mathematical problems defined as  set of objects, the state  which must meet several constraints. CSPs are mostuseful for AI because the regularity of their formulation offers commonality for analyzing and solving the problems.

Digital Marketing Interview Questions and Answers

Top digital marketing interview questions with answers marketing  consists  of  wide range of strategies and tactics used by individuals and  businesses to promote their products, services, or brands using digital channels.

Internet provides platform for  an online presence of your business. Businesses create their websites to showcase their products or services and provide’s information to their target audience. website is considreed as central hub of a company’s digital marketing .


Digital Marketing Interview Questions

1. Explain briefly  about Digital Marketing?

Marketing professionals can use any method of marketing like  electronic devices or a digital mode to deliver their promotionsg and track its effectiveness throughout the journey of consumer . Digital marketing refers to advertisment that appears on phone, computer,  tablet, or other type of electronic device. Online  paid social ads,video, display ads,  SEO and social media posts are some examples.

2. What are  types of Digital Marketing in the industry?

 Digital Marketing formats are as follows:

  • Social Media Profiles
  • Website
  •  Video and Image Content
  • Blog Post and eBooks
  • Customer Testimonials and Reviews
  • Brand Logos, Images, or Icons

3. Why Digital Marketing grown to be huge compared to offline marketing?

In recent years, digital marketing has demonstrated the immense power, and here are some of  most compelling reasons:

  • Directly relate to  the customers’ needs
  • Good exposure to  the product outreach and analytics
  • A more convenient approach to connect with the people from all over the world
  • Changes can be implemented a immediately if required

4. Differentiate between direct marketing and branding?

  • Aim of Direct marketing  is to increase  company’s revenue by creating the demand.Using  stories in branded marketing allows  to connect with your audience on a  deeper level.
  • Direct marketing has a direct impact on revenue.High level of urgency and priority is assigned. Brand marketing has  long-term impact on the brand equity and serves as a good barrier to market pressures.

    5. What are most popular Digital marketing tools?

    Digital Marketing includes various techniques that can be used  to achieve  specific aim. some of the examples are given below.

    • Google Analytics

    Google developed a free analytics platform for the users that lets you track to performance of your  site, video or app. You can calculate advertisements ROI from google analytics.

    • Ahref is an excellent tool for   SEO analysis like backlinks checking.

    • Mailchimp

    Using Mailchimp you can use email marketing tool that lets you to communicate and manage  with the clients and consumers  from one  location.

    • Google Keyword Planner

     Google Keyword Planner  provides assistance  in determining keywords for your Search Network campaigns. It is a free app which allows user to locate the keywords relevant to  business and see how many monthly searches they can  generate and how much it costs to reach target .

    • Kissmetrics

    Kissmetrics is a online analytics software that also provides critical website insight and customers engagement.

    • Keyword Discovery

    Keyword Discovery provides with access to  world’s most comprehensive keyword index, which is compiled from search engines. Access to  consumer search keywords for the  goods and services,  as the search terms that direct users to  competitors’ websites.

    • SEMrush

    Semrush is a  toolkit for gaining web visibility and learning about marketing. SEMrush provides  reports  and tools which will definitely  benefit marketers in  PPC, SEO, Keyword Research, Competitive Research, SMM and content marketing services.

    • Buffer App

    Buffer APP is a business social media management App, which allows users to create content, communicate with  customers, and track social media success. Buffer integrates  social media networks like Instagram,Facebook, and Twitter.

    • AdEspresso

    AdEspresso is simple and intuitive Facebook ad management  tool.

    6. How can you categorize Digital marketing?

    Digital marketing  categorized into  Outbound  and Inbound Marketing.

    •   outbound marketing doesn’t care about the customer interest.where inbound marketing pulls  interested customers,
    • Consumer need is considered as first  priority.
    • 7.Mention few Google AdWords Ad Extensions names that you know?

      • Sitelink extensions 
      • Location extensions 
      • Call extensions 
      • App extensions 
      • Review extensions 
      • Callout extensions 
      • Structured snippet extensions 
      • Price extensions 
      • Automated extensions report 
      • Image extensions 
      • Previous visits 
      • Dynamic sitelink extension.

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List of Docker interview questions



2. How docker is diff from Virtulization ?

3.What is  meant by Virtulization ?

4.List the advantages and disadvantages of docker?

5.What is  the container and Image?

6.Explain the Docker Container lifecycle ?

7.Does Networking adapters supported by docker?

8.How we can persistent container-data?

9.How we can enter  command or how to we can run command in container?

10.What does  volume parameter do in the docker run command?

11.What is the  difference between the approaches of Docker and standard ? 12.what does it mean by Hypervisor virtualization?

13.List the difference between docker save and docker load commands?

14.What is the default Docker network drivers?

15.What are a Docker container’s possible  states, and what do they mean? 16.How can you change image when running a Docker image?

17.What is a Docker image?

18.What is a Docker image registry?

19.What is container orchestration and why should we use container?

20.What are the features  provided by Docker Enterprise Edition instead of 21.Describe Docker Community Edition?

22.Is there any problem with just using the latest tag in a container  and orchestration environment?

23.What is the  best practice for image tagging?

24.What is Docker Swarm ?

25.which network driver should be used with Docker swarm?

26.Mention the possible ways of using insecure Docker image registrie’s?

27.What is Docker Compose? Where can it be used for?

28.How do you scale the Docker containers?

29.How to build envrionment-agnostic systems with Docker?

30.List the most common instructions in Dockerfile?

31.What type of the application’s – Stateless or Stateful are more suitable for the Docker Container?

32.Explain most basic Docker usage workflow?

33.How will you monitor the Docker in production?

34.What is an orphant volume’s and how to remove it?

35.How is Virtual machine different from a DOCKER?

36.Can you explain in detail Dockerfile ONBUILD instruction?

37.Is it safe practice to run stateful applications on Docker? Mention the scenarios where Docker best fits in?

38.Can you run the Docker containers natively on the Windows?

39.How Docker runs containers in non-Linux systems?

40.How containers works at the low level?

41.Name the possible limitations of containers vs VM?

42.Why does the Docker compose does not wait for a container to be ready? 43.Before moving start next service in dependency order?

44.What are the Differances between the Dockerfile and DockerCompose?

45.Describe important Instructions used in Dockerfile?

46.What are the differences between ADD  and COPY in Dockerfile?

47.What are the differences between  RUN and CMD ,mention  the differences between ENTRYPOINT and CMD?

48.What is difference between  dockerhub and DTR?

49.Disadvantages of using dockerhub?

50.What is  the docker commit command ? How we can we create image from container?

you can prepare for  DOCKER certification