February 15, 2021

Top 20 AWS DevOps Cloud Interview Questions & Answers


Ques. 1): What do you know about AWS DevOps?

Answer: Your response needs to be clear and understandable. First, describe DevOps’ increasing significance in the IT industry. Discuss how such a strategy helps to synergize the production and operations teams’ strategies to maximize digital product distribution with a low failure rate. Talk about how DevOps is a value-added process where architecture and operation engineers collaborate during the product or service’s lifecycle, right from the design phase to the implementation phase.


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Ques. 2): What role does AWS play in DevOps?

Answer: Most often you will come across this DevOps Interview Question in your interviews. In DevOps, AWS has the following role:

   Flexible technology – Offers ready-to-use, customizable facilities without the need for program development or configuration.

   Constructed for scale – Using AWS systems, you can handle a single instance or scale to thousands.

   Automation – AWS lets you simplify activities and procedures, allowing you to create further

   Safe – You can configure user permissions and policies using the AWS Identity and Access Control (IAM).

   Large partner ecosystem – AWS supports a broad partner ecosystem that incorporates and expands AWS services.

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Ques. 3): Why the Opensource tools boost DevOps?

Answer: Opensource tools predominantly used by any organization which is adapting (or) adopted DevOps pipelines because devops came with the focus of automation in various aspects of organization build and release and change management and also infrastructure management areas.

So developing or using a single tool is impossible and also everything is basically trial and error phase of development and also agile cuts down the luxury of developing a single tool , so opensource tools were available on the market pretty much saves every purpose and also gives organization an option to evaluate the tool based on their need .

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Ques. 4): What are the uses of integrating cloud with DevOps?

Answer: The centralized nature of cloud computing provides DevOps automation with a standard and centralized platform for testing, deployment, and production.Most cloud providers gives Even DevOps technologies like CI tools and deployment tools as a service like codebuild, codepipeline, codedeploy in AWS makes easy and even faster rate of DevOps practice.

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Ques. 5): Why do you think a Version control system is necessary for DevOps team?

Answer: Application is all about code, if the UI is not behaving as expected, there could be a bug in the code. To track the code updates, versioning is a must.

By any chance if bug breaks the application, we should be able to revert it to the working codebase. Versioning helps to achieve this.

Also, by keeping a track of code commits by individuals, it is very easy to find the source of the bug in the code.

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Ques. 6): What are the different phases in DevOps?

Answer: The various aspects of the DevOps lifecycle are as the following:

      Plan– Originally, a schedule should be drawn up for the form of application to be created. It is still a smart thing to get a clear view of the production process.

      Code-The program is configured according to the needs of the end-user.

      Construct– Build the program by combining different codes developed in the preceding phases.

      Test-This is the most critical step in the creation of an application. Check the document, and if necessary, restore it.

      Integrate– Several codes are built into one by various programmers.

      Deploy– Technology is being distributed for further use in a cloud environment. It is assumed that the new developments will not impact the operation of a website with heavy traffic.

      Operate– Where necessary, operations are conducted on the file.

      Monitor– It tracks the performance of programs. Changes are made to meet the demands of the end-user.

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Ques. 7): Describe how “Infrastructure code” is processed or completed in AWS?

Answer: In AWS,

      The Infrastructure Code will be in JSON format

      This JSON code is stored in files called templates

      These templates can be deployed and then handled as stacks on AWS DevOps

      The CloudFormation provider will then do the stack process Forming, removing, upgrading, etc.

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Ques. 8): What is the concept of Continuous Integration in Devops?

Answer: Continuous integration is an increasingly critical aspect of the Agile process. Developers usually function during a sprint on functionality or user experiences and contribute their version control repository changes.

If the code has been committed, then the developers’ entire work is well organized, and the build is done on a routine basis depending on each check-in or schedule. Continuous integration thus requires the creator to merge their improvements with the others, to receive early feedback.

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Ques. 9): What are the scripting languages can be used in DevOps?

Answer: As with scripting languages , the basic shell scripting is used for build steps in Jenkins pipelines and python scripts can be used with any other tools like Ansible , terraform as a wrapper script for some other complex decision solving tasks in any automation as python is more superior in complex logic derivation than shell scripts and ruby scripts can also be used as build steps in Jenkins.

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Ques. 10): What is the distinction between Continuous Delivery and Continuous Deployment?

Answer: There are several applications or user stories that are created, tested, and ready for implementation in an Agile Sprint, For Instance. But not everyone will be implemented depending on the client’s requirements and goals. But it’s essential to keep the code readily accessible for distribution here in continuous Delivery.

In Continuous Deployment, all the improvements made by the developer go through different stages to be delivered in an automated fashion into the PRODUCTION circumstances.

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Ques. 11): What is the difference between Ansible and chef(or) puppet?

Answer: Ansible is Agentless configuration management tool, where puppet or chef needs agent needs to be run on the agent node and chef or puppet is based on pull model, where your cookbook or manifest for chef and puppet respectively from the master will be pulled by the agent and ansible uses ssh to communicate and it gives data-driven instructions to the nodes need to be managed , more like RPC execution, ansible uses YAML scripting, whereas puppet (or) chef is built by ruby uses their own DSL .

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Ques. 12): Is DevOps the part of Agile methodology?

Answer: Yes, DevOps is the part of agile methodology, with the main difference is that it can only be applied over the section on growth. Agile will, at the same time, be used for both processes and improvements.

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Ques. 13): Can you list out some of the popular tools for DevOps?

Answer: Some of the polular tools are:







      ELK (Elasticsearch, Logstash, Kibana)

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Ques. 14): How many types of repositories available in Git?

Answer: There are two types of repositories available in Git:

Bare Repositories (Central): These repositories are only for Storing & Sharing the code. All central repositories are bare repositories

Non – Bare Repositories (Local): In these repositories, we can modify the files. All local /user repositories are Bare Repositories.

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Ques. 15): Can you explain Pair Programming concerning DevOps?

Answer: Pair programming is an Extreme Programming Principles Architecture technique. Two programmer function on the very same device in this form, on the same layout/algorithm/code.

One programmer acts as a “horse,” and another acts as an “observer” who always watches a project’s development to detect issues. With no intimation, the functions can be switched at any time.

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Ques. 16): What is docker swarm?

Answer: Group of Virtual machines with Docker Engine can be clustered and maintained as a single system and the resources also being shared by the containers and docker swarm master schedules the docker container in any of the machines under the cluster according to resource availability

Docker swarm init can be used to initiate docker swarm cluster and docker swarm join with the master IP from client joins the node into the swarm cluster.

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Ques. 17): What is a version control system?

Answer: Version Control System (VCS) is a software that helps software developers to work together and maintain a complete history of their work.

Some of the feature of VCS as follows:

   Allow developers to wok simultaneously

   Does not allow overwriting on each other changes.

   Maintain the history of every version.

There are two types of Version Control Systems:

1.      Central Version Control System, Ex: Git, Bitbucket

2.      Distributed/Decentralized Version Control System, Ex: SVN

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Ques. 18): What is Git Bisect?

Answer: Git Bisect we use to pick bad commit out of all good commits. Often developers do some mistakes. For them it is very difficult to pick that commit where mistake is there. They go with building all commits one by one to pick bad commit. But Git bisect made their lives easy. Git bisect divides all commits equally in to two parts (bisecting equally). Now instead of building each commit, they go with building both parts. Where ever bad commit is there, that part build will be failed. We do operation many times till we get bad commit. So Git bisect allows you to find a bad commit out of good commits. You don’t have to trace down the bad commit by hand; git-bisect will do that for you.

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Ques. 19): What is IAC?

Answer: IAC means Infrastructure As Code. It is the process through which we automate all admin tasks. Here we write code in Ruby script in chef. When you apply this code, automatically code will be converted into Infrastructure. So here we are getting so many advantages in writing the code. Those are

1. Code is Testable (Testing code is easy compare to Infrastructure)

2. Code is Repeatable (Can re-use the same code again and again)

3. Code is Versionable (Can store in versions so that can get any previous versions at any time)

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Ques. 20): What is the role Of HTTP REST API in DevOps?

Answer: As Devops is purely focuses on Automating your infrastructure and provides changes over the pipeline for different stages like an each CI/CD pipeline will have stages like build, test, sanity test, UAT, Deployment to Prod environment as with each stage there are different tools is used and different technology stack is presented and there needs to be a way to integrate with different tool for completing a series toolchain, there comes a need for HTTP API , where every tool communicates with different tools using API , and even user can also use SDK to interact with different tools like BOTO for Python to contact AWS API’s for automation based on events , nowadays its not batch processing anymore , it is mostly event driven pipelines

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  1. thankyou for sharing very informative content.

  2. Thank you for your kind comment. it really helps us to work hard.