A team runs a PostgreSQL container that stores data in /var/lib/postgresql/data. The container is frequently recreated during development. The team wants the database data to persist across container recreations and be easily accessible for backup from the host. Which approach should be used?

docker run -v /var/lib/postgresql/data:/host/backups postgres:latest

docker run -v pgdata:/var/lib/postgresql/data postgres:latest

docker run -v /host/backups:/var/lib/postgresql/data postgres:latest

A docker-compose.yml defines a web service and a database service. The web service needs the database connection string from an environment variable DB_URL. The team wants to keep the database credentials out of the compose file and version control. The compose file is run with docker-compose up. Which approach satisfies the requirement?

Define DB_URL in an .env file in the same directory and reference it as ${DB_URL} in the compose file

Use docker run -e DB_URL=... for the web service instead of docker-compose

Set DB_URL in the Dockerfile with ENV

Hardcode DB_URL in the compose file under the web service's environment section

A docker-compose.yml defines a service 'app' that needs a secret API key. The team wants to pass the key at runtime without storing it in the compose file or the image. The key is available in the shell environment as API_KEY. Which compose configuration passes the value to the container?

environment: - API_KEY=secret-value

environment: - API_KEY=${API_KEY}

CiscoCertified DevNet Professional

Domain 4Objective 4

Utilize Docker to Containerize an Application 350-901 Practice Questions (Page 3)

Part of the 4.0 Application Deployment and Security domain, which accounts for 20% of the 350-901 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~10–16 in this domain), expect 1–1 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

10concepts

20%of the exam

Questions 11–15

11application · medium
A team runs a PostgreSQL container that stores data in /var/lib/postgresql/data. The container is frequently recreated during development. The team wants the database data to persist across container recreations and be easily accessible for backup from the host. Which approach should be used?
Select an answer first
12foundation · easy
Which command starts all services defined in a docker-compose.yml file in the current directory?
Select an answer first
13expert · hard
A docker-compose.yml defines a web service and a database service. The web service needs the database connection string from an environment variable DB_URL. The team wants to keep the database credentials out of the compose file and version control. The compose file is run with docker-compose up. Which approach satisfies the requirement?
Select an answer first
14expert · hard
A docker-compose.yml defines a service 'app' that needs a secret API key. The team wants to pass the key at runtime without storing it in the compose file or the image. The key is available in the shell environment as API_KEY. Which compose configuration passes the value to the container?
Select an answer first
15foundation · easy
In a docker-compose.yml file, which top-level key defines the services that make up the application?
Select an answer first

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Utilize Docker to Containerize an Application 350-901 Practice Questions (Page 3)

Questions 11–15

A team runs a PostgreSQL container that stores data in /var/lib/postgresql/data. The container is frequently recreated during development. The team wants the database data to persist across container recreations and be easily accessible for backup from the host. Which approach should be used?

Which command starts all services defined in a docker-compose.yml file in the current directory?

A docker-compose.yml defines a service 'app' that needs a secret API key. The team wants to pass the key at runtime without storing it in the compose file or the image. The key is available in the shell environment as API_KEY. Which compose configuration passes the value to the container?

In a docker-compose.yml file, which top-level key defines the services that make up the application?

Keep studying — 4.0 Application Deployment and Security