Docker - Interview Question Set-1
Question-1: What are the benefits of using Docker containers compared to traditional virtualization?
Answer: Docker containers are more lightweight and portable compared to traditional virtualization, as they do not require a full-fledged virtual machine, but rather share the host operating system kernel.
This results in faster start-up times, lower overhead, and better performance.
Additionally, Docker containers provide better consistency, as each container runs the same environment, which is defined by the image.
Question-2: How can you manage persistent data storage for containers?
Answer: Persistent data storage for containers can be managed using Docker volumes. Volumes are created on the host file system and are then mounted into the container, providing persistent data storage.
Another option is to use data volumes containers, which are separate containers that are specifically created to store data.
Question-3: You have a large number of containers and you need to find a specific one. How would you do this?
Answer: To find a specific Docker container, you can use the docker ps command with the --filter option. For example, docker ps --filter name=<container_name> will display the containers that match the specified name.
You can also use the docker ps command with the -a or --all option to display all containers, including those that have stopped, and then use grep to search the output.
Question-4: How does Docker handle network communication between containers and host?
Answer: Docker containers can communicate with each other and with the host using network bridges.
By default, each container has its own isolated network namespace, but they can also be connected to the same network or to multiple networks. The host can access containers using the IP addresses assigned to them on the bridge network.
Question-5: How can you secure Docker containers and the host system?
Answer: Docker provides several security features to secure containers and the host system, such as: user namespaces, control groups (cgroups), and secure computing mode (seccomp).
Additionally, it is recommended to follow best practices for securing Docker containers, such as running containers as non-root users, using image scanning tools, and regularly updating the host and container software.
Kindly refer my YouTube Video for more detail on this topic:
Post a Comment