Docker for the Absolute Beginner - Hands-On - Docker Engine

The video tutorial provides an in-depth look at Docker's architecture, explaining how it runs applications in isolated containers. It covers the components of Docker, including the Docker daemon, REST API server, and CLI. The tutorial also discusses namespace isolation, which allows processes within containers to have unique process IDs, and resource management using cgroups to limit CPU and memory usage. Additionally, it explains how Docker CLI can be used remotely to manage Docker engines.

Which component of Docker is responsible for managing Docker objects like images and containers?

• Docker Daemon

• Docker Engine

• Docker CLI

• REST API Server

How can the Docker CLI interact with a remote Docker engine?

• By using a cloud service

• By specifying the remote engine's address and port

• By using a VPN connection

• By installing Docker on the remote system

What is the purpose of namespaces in Docker?

• To connect containers to the network

• To manage Docker images

• To isolate processes and provide container independence

• To allocate system resources

In a container, what process ID does the root process typically have?

• 2

• 3

• 1

• 0

How does Docker ensure that a container perceives itself as an independent system?

• By assigning unique IP addresses

• By creating separate user accounts

• By using process ID namespaces

• By using virtual machines

What mechanism does Docker use to limit the CPU usage of a container?

• Control Groups (cgroups)

• Docker Daemon

• Namespaces

• Virtual Machines

How can you restrict the memory usage of a Docker container?

• By using a third-party tool

• By using the --memory option

• By setting a limit in the Dockerfile

• By configuring the Docker Daemon