What is the 'build context' in a Docker build?

The base image specified in the FROM instruction

The runtime environment of the container

The network configuration for the container

The directory containing the Dockerfile and files that can be copied into the image

A team uses Docker Compose to run a web app and a database. The database must persist data across container restarts. Which compose file configuration achieves this?

Set 'restart: always' on the database service to ensure data persists.

Use a bind mount in the database service without declaring it in the top-level 'volumes' section.

Define a named volume in the top-level 'volumes' section and mount it in the database service.

Store data in the container's writable layer, which persists by default.

A developer needs to run a container that communicates with another container on the same host. The developer wants to avoid exposing the service to the host network. Which approach is most appropriate?

Use the default bridge network and rely on IP addresses for communication.

Create a custom bridge network and attach both containers to it, then use container names for communication.

Publish the port on the host and have the other container connect via localhost.

Use the host network mode for both containers and communicate via localhost.

Juniper NetworksCertified Associate, Cloud

Domain 4Objective 8

Creating Containers Using Docker JN0-214 Practice Questions (Page 1)

Part of the Cloud Virtualization domain, which makes up ~26% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~9–16 in this domain), expect 1–2 from this objective — we provide 30 practice questions to prepare you well beyond it. (estimate)

30questions here

6free pages

11concepts

Questions 1–5

1foundation · easy
What is the 'build context' in a Docker build?
Select an answer first
2foundation · easy
Which command lists all running containers?
Select an answer first
3application · medium
A team uses Docker Compose to run a web app and a database. The database must persist data across container restarts. Which compose file configuration achieves this?
Select an answer first
4expert · hard
A developer needs to run a container that communicates with another container on the same host. The developer wants to avoid exposing the service to the host network. Which approach is most appropriate?
Select an answer first
5foundation · easy
Which `docker run` option sets an environment variable inside the container?
Select an answer first

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Creating Containers Using Docker JN0-214 Practice Questions (Page 1)

Questions 1–5

What is the 'build context' in a Docker build?

Which command lists all running containers?

A team uses Docker Compose to run a web app and a database. The database must persist data across container restarts. Which compose file configuration achieves this?

A developer needs to run a container that communicates with another container on the same host. The developer wants to avoid exposing the service to the host network. Which approach is most appropriate?

Which `docker run` option sets an environment variable inside the container?

Keep studying — Cloud Virtualization