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Docker Interview Questions and Answers for Professionals | Docker tutorial | Code Decode Udemy Course of Code Decode on Microservice k8s AWS CICD link: https://openinapp.co/udemycourse Course Description Video : https://yt.openinapp.co/dmjvd In this video of code decode, we have explained about docker and interview questions and answers related to docker What is Docker? We can imagine Docker as a Cargo Ship that has the ability to hold big boxes (containers) having their distinct objectives and id. These containers contain items (application + Dependencies) that are required to make that container useful and runnable anywhere. These items are manufactured using templates ( Docker File ). Docker - Docker is a containerization platform which packages your application and all its dependencies together in the form of containers so as to ensure that your application works seamlessly in any environment, be it development, test or production. Hence A container contains complete ecosystem of your application including the application and all of its dependencies, and everything that is needed for an application to run on the server This guarantees that the software will always run the same, regardless of its environment. What is a container? A container is a runnable instance of an image. You can create, start, stop, move, or delete a container using the Docker API or CLI. Containers provide you with a lightweight and platform-independent way of running your applications. Every container is isolated but access to resources on another host or container can be allowed with the help of docker networking. A container is volatile it means whenever you remove or kill the container then all of its data will be lost from it. If you want to persist the container data use the docker storage concept. Containers only have access to resources that are defined in the image, unless additional access is defined when building the image into a container All the docker images become docker containers when they run the on Docker Engine What are docker images? Docker-images are a read-only binary template ( Like snapshots ) used to build containers. Images also contain metadata that describe the container’s capabilities and needs. Create a docker image using the docker build command whenever you pass a Dockerfile to the docker build command then the docker daemon will create a docker image according to the Dockerfile instruction. Docker images can’t be executed by themselves and cannot run or start. It is just a blueprint for creating Docker containers Run the docker images using the docker run command. whenever we pass the command to docker client then the docker client passes this command to the docker daemon then docker daemon will create the container for that image. Push the docker image to the public registry like DockerHub using the docker push command after pushed you can access these images from anywhere using docker pull command What is a DockerFile? This text file provides a set of instructions to build a Docker image, including the operating system, languages, environmental variables, file locations, network ports, and any other components it needs to run. Each time a command is run in a Dockerfile, a new layer is created on top of the previous layers. This allows Docker images to be built incrementally, with each layer representing a separate instruction in the Dockerfile. It also allows Docker to reuse layers between images, which can help reduce the size of images and improve build times. For example, if you specify a command to install a package in your Dockerfile, a new layer will be created that includes the package and its dependencies. If you make another change, such as adding a file to the image, another layer will be created on top of the previous one Most Asked Core Java Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXscoyL5XEZoHHZ86_6h3GWE1 Advance Java Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXsexOO1VQ4vs-BM2-8CKrixd Java 8 Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXsdeusn4OM33415DCMQ6sUKy Hibernate Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXsdC-p2186C6NO4FpadnCC_q Spring Boot Interview Questions and Answers: https://youtube.com/playlist?list=PLyHJZXNdCXsexOO1VQ4vs-BM2-8CKrixd Angular Playlist: https://www.youtube.com/watch?v=CAl7RQSdq2Q&list=PLyHJZXNdCXsfxRtDwtGkDD_lLfTWc1g0i SQL Playlist: https://www.youtube.com/playlist?list=PLyHJZXNdCXse86eLuwy5uZohd_bddE9Ni GIT: https://youtube.com/playlist?list=PLyHJZXNdCXscpl6pxOnL2lRWJlzvzjyZE Subscriber and Follow Code Decode Subscriber Code Decode: https://www.youtube.com/c/CodeDecode?sub_confirmation=1 LinkedIn : https://www.linkedin.com/in/codedecodeyoutube/ Instagram: https://www.instagram.com/codedecode25/ #docker #dockerinterviewquestions #codedecode