Containers XK0-006 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A company runs a web application in a Docker container and a database in another container. The web application needs to communicate with the database using the hostname 'db', but the two containers are currently on different networks and cannot reach each other. The administrator wants to enable communication between the two containers without exposing the database to the host network. What should the administrator do?

   • APublish the database port on the host and connect from the web app using the host's IP.
   • BUse the default bridge network and rely on IP addresses.
   • CUse the host network mode for both containers.
   • DCreate a custom bridge network and attach both containers to it.
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   Which command is used to start a new container from an existing image in both Docker and Podman?

   • Adocker start
   • Bdocker exec
   • Cdocker create
   • Ddocker run
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4. 3expert · hard

   A company runs a multi-tier application in Docker containers: a frontend container, a backend API container, and a database container. The frontend needs to communicate with the backend, and the backend needs to communicate with the database. The database should not be accessible from the frontend. The administrator wants to use Docker networks to enforce this isolation. Which network configuration should the administrator use?

   • AUse the host network for all containers.
   • BCreate two separate bridge networks: one for frontend and backend, and one for backend and database. Attach the backend to both networks.
   • CCreate a single bridge network and attach all three containers to it.
   • DCreate two bridge networks and attach the frontend to both, and the backend to one.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   Which Docker command connects a running container to an existing network?

   • Adocker network create
   • Bdocker connect
   • Cdocker network connect
   • Ddocker network attach
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6. 5application · medium

   An administrator needs to create a Docker network that allows containers to communicate with each other using their container names, but also ensures that the network is isolated from the host network. The administrator wants to use a network driver that provides this functionality. Which network driver should the administrator use?

   • Ahost
   • Bnone
   • Coverlay
   • Dbridge
   Reveal Solution Discussion Select an answer first