Day-29 | Docker Interview Questions with Answers | How many can you answer ? | Comment your score 

everybody will do launch paid devops course, but this man do totally free, hats off man with my bottom heart, your work very much appreciate again thankyou launching for this course.

Question: what are real-time challanges with docker? Ans. Docker has a single point of failure. If docker daemon goes down, application is down. - docker run as root user which is a security threat. - resource constraints - if you are running too many containers on a single host, you may experience resource constraints. This can lead to slow performance or crashes. Solution is podman. Which solves your docker problem. It is not single point failure, it can run as normal non-root user. Ques. What steps you will take to secure containers? Ans. 1. Use distroless or image with not too many packages as your final image in multi stage build. 2. Ensure that networking is configured properly. If required configure custom bridge network and assign them to isolate networks. Create different bridge network for finance application. 3. Use utilities like Sync to scan your container images. Before you push them to production or staging environment.

One major diff between ADD and COPY is if you add a file present in .tar.gz format it'll be automatically unzipped in created container whereas copy doesn't have this feature )

By free means only in terms of money. All your videos compete with top tier trainings in India. In explaining the comcepts, "thaggede le" thank you Abhishek. 🙏👍👌

Thanks abhishek sir for the wonderful course content. I'm confident enough.

Hi Abhishek sir, From day 23 to 29 was very clear and you have cleared many doubts this was the best content about containers and docker I never seen in RU-vid and finally, I scored 11 answers

Docker is a Open Source PAAS based Platform . It is a container based application tool which have all the dependencies , library and binaries irrespective of the fact whatever OS it is .

In this globalized world all are running back to money but you are uploading free videos with real time scenarios it help full all .thank u, please keep on post

Dear Abhishek you are doing a great service to the community. Sincerely thank you anna

TQ for sharing the video sir, it's help me a lot to understand what type of questions the interviewer is going to ask and u covered all topics in docker with clear explanation

Abhishek you are the super star of the DevOps thank you so much

Thank you anna you are doing awesome anna you are irreplaceble with any one thank you so much from bottom of my heart

Thank you very much for letting me refresh docker knowledge in quickly.

You have discussed all 12 questions previously, but get to know a few more points (real-time challenges and steps to secure containers) from the last 2 questions. Thank you so much Abhishek 🙏 God Bless You 😇

Thanks for sharing covering this Abhishek, Really Helpful. Hearing for the 1st time about "Sync" utility and how its helpful but able to answer all the questions.

Thanks Abhishek,The Docker concepts r very clear i have seen other courses previously but ur content gave me confidence..thanks again for bringing in good content for free ..even the paid courses dnt teach this much

Thank you so much for teaching 💓

Much appreciated Abhishek, Really helpful for all kind of audiences in DevOps domain

Thanks a lot brother..its very clear in networking concepts in docker as well as bridge and host network. Thank you soo much!!

this video gave real vibe of interview scenario thanks alot abhishek ...

Lovely, thank you. this is a valuable information

Thanks abhishek for sharing these informative Question.

As usual one stop solution for devops.. thanks a lot abhi and kudos to your efforts.

You are the best ❤️, thanks alot for the content/knowledge that you are sharing 😊

Thank you Abhishek. This video is a gem. As u said it's a crux of the docker videos you made. The checkboxes as well 👌

Great course 💗

Thank You Sir for day 23-29! I was really excited for docker & Kubernnetes. I was able to answer 8 questions.

Thank you .

Just thanks🎉

Iam very much impressed with your classes please continue and cover some real time projects please use different build tools..cicd pipeline and use plug-in also sir..

For the challenge of Docker Daemon as root, i used the concept of Apparmor. Bringing your docker up with Apparmor will bring up much more secure docker

thank you sir , For giving me search a overall view how to secure the containers ,network secure

You should be a udemy tutor... specially for those scenario based questions..

Abhishek, I wonder how neatly the course is arranged and thought. Just thinking of homework you have done to put these videos. what is needed how much needed and what not to miss etc. I got little interest while searching for virtualization and after watching your videos its like bundle of information neatly explained. Going through the DevOps course. Thanks a lot for your efforts.

Thank youu Abhishek

We would be delighted if you come up with a session on how to write a Dockerfile for real-time projects...Once again, thanks for our selfless work to the community, Abhishek Anna!! ♥

Great effort!! THANKS ALOT ❤

Bro very thanks please also make videos for docker swarm and docker compose. This will help us more in future.

Thank you for the wonderful explanation🙂

Awesome job!!!!!

You are truly gem bhaiya❤

Hai Abhishek, you have explained all topics in much detailed way. Can you please make a small video to explaining the docker-compose and how this is useful to perform multiple docker services containers. Please as per your free time do consider it Abhishek. Thank you

I am waiting this video 😍 thnx sir

Some advanced questions on docker asked to me in interviews: How to run multiple docker compose on same machine What is build context What is run context Flow of request when you type docker commands How to connect to different daemons on demand through same docker client Env vs Build arguments How to pass arguments to containers which do not get persisted in the containter after build stage How env is different than arg What is -build-arg What are docker buildx What is scratch image What is distroless image How do you mount a docker secret Restart policy in docker

Thanks a lot, Abhi🙏

Hello Abhishek appreciate your efforts ,Thank you so much if you can share more interview questions or links that will be great help.

Bro tell me how many real time projects in this playlist or else entire channel? And what are the day or video number? Is that the projects can I mention my cv or not

anna , also create a video or shorts on buildah as you told it resolves some of challenges of docker ..

nice explain. thanks.👍

Please create a blog on Podman vs Docker with a Hands-on project for production environment .

Hi Abhishek, If possible please add questions like - what are layers present in docker file with examples.

Believe me Aap Devops, Cloud computing ke IIT , IIM, IISC University sab kuch ho sir ❤

hi abhishek firstly i thankful for providing valuable devops course in free. Can you make a deep dive in containers networking explaining overlay n/w , Macvlan

I got a few questions from this video Bro..at that moment I did not watch this video. How do we access application inside a container without using container port to debug some issue or etc.? this is one among them. Ur series gave me confidence Bro..

all and very easily

No one can explain in these days 😍

Nice one 👏

Nice one. can you please include little more practical challenges that might you faced in a real time....

abhishek please do videos on docker swarm and docker compose

Hi Abhishek sir,please make a viedio on docker swarm and docker compose

just to point out one thing, the diagram which u have used for question 2 is wrong...n i really appreciate the way u explain things as well as i think 90% of the content is very relevant n real-time...Appreciate ur efforts bro...i'll donate some amount if u allow us to do so because creating content also needs resources

Thanks bro

i got 9 correct bro. But i need to develop my english so that i can tell the answers in structured way

Hi Abhishek, you are doing an amazing job!!! Coming to my query, I am a bit confused when you say that scurity of containers is less compared to that of a VM, but the fact remains that in real world, containers in all probability will be set up on the VMs only, so it seems a contradiction, may be my fundamental understanding is wrong..

Hello, Thanks for the great DevOps playlist. I am learning a lot through your teachings. I am just wondering if there is a video for docker swam or docker compose? Can you also explain what is the difference between multi-stage docker builds and docker compose?

Awesome sir again, I answered 11 questions, need to improve the english more, One question though sir, What are the benefits of joining RU-vid channel / benefit of Telegram channel?

about 8 questions, Can you have a full video on Docker compose.

Superb

Question. What is multi stage build in docker ? Ans. Concept of container itself is to keep it lightweight. Multi stage build allows you to build your docker container in multiple stages allowing you to copy artifacts from one stage to other. The major advantages of this is to build light weight containers. All dependencies and heavy base image were required only in build stage Final application build artifact(jar file) requires only Java runtime, not the dependencies required to build the application. So, final image size will drop from 800 MB to 20 mb. Ques. What are distroless images in docker Ans. Containers are also exposed to security vulnerabilities, cuz they are minimal os, still. Some images such as ubuntu comes with os related vulnerabilities or MySQL related dependencies. To solve this, image size was further shrunk. Distroless image are very very minimal such as scratch are hardly 1-2 mb. Instead of base image use distroless image. You don't even have basic command such as apt.

I have added all the question in md file and created a pull request. It will help others you can check it and merge,

Hi Abhishek bro, how long can we sustain our career with Devops in the market if we learn?

Hi abhishek garu thanks for your videos,one of the interview question is how do you check the vulnerabilities of docker image we created. 2.What happens if you update the image to the existing will it overwrite? 3.What happens if you update the image while container is running?

can we have more questions like related to storage driver,volume manager and space related Abhishek..

Abhishek, you introduced Buildah initially and is their any plan to make a session on it ? Also, could you please provide example for docker prune as well ..

Hello Abishek, thanks for all but I have a question would it reduce windows image as well? in terms of light weight? what about license term will work on this case for windows?

I know 8 questions

Aap itne acche kyun ho .....😊 May goddess Saraswati give you more and more knowlege....ahh but share it with us also ...😊

i can able to answer 9 questions..

Thanks for the wonderful session, so this distroless image can be used only with multi stage docker container, Right ?

can we use 3-4 same containers in docker? so one goes down one will serve the application?

Hey Abhishek, It will be great if u can share all questions and answers in file.

33:40 u said if daemon goes down all app down right, so what are the reasons to daemon goes down and to fix the problem

sir, casn you please explain about docker swarm and docker compose?

Do make one video on current devops fresher job market also bcoz companies are only hiring exp people. No calls for fresher bro

❤

make combo of one programming lang mysql and nginx real use cases

Hi bro , In question 11 , u told that running docker daemon as root is a challenge...am sorry ...bcoz i feel usually root users will be sysadmins and they will have good subject knowledge and why should it turn as security threat and challenge.... Pls help me understand Tnx !!

10/12

9/12

Can you make k8s interview questions For experience people

Could you please start a new. Series for freshers

10questions

Hi I have gone thru all ur videos and may I know if this is sufficient for 4 years experience crack interview and work Thank you

In interviews ,they ask from git, jenkins, docker, ansible, kubernetes, linux ,shell script, monitoring, troubleshooting, terraform, aws....My question is how to set interviewer expectation to only those parts in which i am strong as i having just knowledge on few components not having hands on....but if you dont mention these all in CV , no call and if we have just theoritical knowledge ,we get grilled .....so how to showcase our best tools so that we can ace interview....kindly suggest

Hi, Difference between multi-Stage build vs docker-compose?

Hi Abhishek, could you please do video on advanced docker interview questions 🙏 🙏

What are the daily activities you do in docker? How to answer this question in interviews?

Abhishek Sir, I could not find Join Button to your channel. how to join pls guide me.

34:18 How can we configure the resources ?

in some docker file we can write so many cmd commands but its take latest cmd command(last cmd command) argument so what is purpose of other cmd explain me