How do you map a host port to the container port?

Docker - Quiz(MCQ)

docker run -i : imagename

docker run -p 5000:5000 flask_app:1.0

docker run --expose 5000:5000 flask_app:1.0

None of the above

Correct Answer : docker run -p 5000:5000 flask_app:1.0

Explanation : -p is a short flag for --port option to map host port to container port.

Recently Updated in Docker Questions

A Docker container is often described as an improvement over what other technology?

DevOps

microservices

cloud computing

virtual machines

Correct Answer : virtual machines

Explanation :

Docker containers are often compared to VMs, as both provide the ability to deploy and run multiple, independent applications on the same physical machine.

Docker containers are less resource intensive, as they provide process-level virtualization as opposed to full OS virtualization provided by a VM, which is one of the reasons the industry has shifted toward containers.

The history of application containerization is intimately tied to which OS?

MacOS

Linux

Windows

Android

Correct Answer : Linux

Explanation : Linux added two features to its kernel, namely control groups and namespaces, that made it possible to run software in isolated containers. These two changes made the container revolution possible.

At the OS level, the goal of independent application execution and failure isolation is achieved through the use of:

namespaces

Kubernetes

control groups

security groups

Correct Answer : namespaces

Explanation :

Namespaces make the isolation of the process that runs a Docker container possible.

Control groups are what make it possible to limit the amount of CPU time and memory allocated to a given container.

Security groups are typically associated with AWS configurations, and Kubernetes is a container orchestration tool.