A development team wants to run a web app and its PostgreSQL database locally with a single command, ensuring the database is only reachable from the web app container and that the web app can find the database using a stable hostname. Which approach should they use?

Create a Docker Compose file with two services, define a custom network, and reference the database service name in the web app's connection string.

Run both containers with `docker run` and use `--link` to connect them, then use the container ID in the connection string.

Create a shell script that starts the database container, waits, then starts the web app container with the database's IP address.

Use a Dockerfile to install PostgreSQL inside the web app image so only one container is needed.

A small company runs a containerized application on three Docker hosts. They want to deploy the application as a replicated service across the cluster, with automatic load balancing and the ability to update the application without downtime. They prefer a solution that is already integrated with the Docker CLI and does not require additional external components. Which solution should they choose?

Docker Compose with `docker-compose up --scale` on one host.

Docker Swarm with a service definition that specifies the desired number of replicas.

A custom script that uses `docker run` on each host and updates DNS records manually.

Kubernetes with a Deployment and a Service.

What is the primary role of Docker Swarm?

To store and distribute container images

To cluster and orchestrate containers across multiple Docker hosts

To provide a graphical interface for managing Docker containers

To build container images from a Dockerfile

A company is evaluating Mesosphere DC/OS for running a mix of containerized microservices and stateful data services. They need to ensure that if a node fails, the data services are rescheduled and their data remains available. Which DC/OS feature is designed for this?

DC/OS's multi-cluster management

LPIC-3 Virtualization and Containerization

Domain 2Objective 4

352.4 Container Orchestration Platforms (weight: 3) LPIC-3-VIRTUALIZATION Practice Questions (Page 3)

Part of the Topic 352: Container Virtualization domain, which makes up ~32% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~11–19 in this domain), expect 3–5 from this objective — we provide 31 practice questions to prepare you well beyond it. (estimate)

31questions here

7free pages

8concepts

Questions 11–15

11application · medium
A development team wants to run a web app and its PostgreSQL database locally with a single command, ensuring the database is only reachable from the web app container and that the web app can find the database using a stable hostname. Which approach should they use?
Select an answer first
12application · medium
A small company runs a containerized application on three Docker hosts. They want to deploy the application as a replicated service across the cluster, with automatic load balancing and the ability to update the application without downtime. They prefer a solution that is already integrated with the Docker CLI and does not require additional external components. Which solution should they choose?
Select an answer first
13foundation · easy
What is the smallest deployable unit in Kubernetes that can be created and managed?
Select an answer first
14foundation · easy
What is the primary role of Docker Swarm?
Select an answer first
15application · medium
A company is evaluating Mesosphere DC/OS for running a mix of containerized microservices and stateful data services. They need to ensure that if a node fails, the data services are rescheduled and their data remains available. Which DC/OS feature is designed for this?
Select an answer first

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352.4 Container Orchestration Platforms (weight: 3) LPIC-3-VIRTUALIZATION Practice Questions (Page 3)

Questions 11–15

A development team wants to run a web app and its PostgreSQL database locally with a single command, ensuring the database is only reachable from the web app container and that the web app can find the database using a stable hostname. Which approach should they use?

What is the smallest deployable unit in Kubernetes that can be created and managed?

What is the primary role of Docker Swarm?

A company is evaluating Mesosphere DC/OS for running a mix of containerized microservices and stateful data services. They need to ensure that if a node fails, the data services are rescheduled and their data remains available. Which DC/OS feature is designed for this?

Keep studying — Topic 352: Container Virtualization