300-910 · Question #105
300-910 Question #105: Real Exam Question with Answer & Explanation
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Question
Refer to the exhibit. A DevOps engineer is deploying a stack of services with Docker Compose. A containerized application running in the app Docker container must communicate with the web-server Docker container running a NGINX web server. How must communication between the two Docker containers be configured? ```yaml version: "3.3" services: app: build: . environment: SERVER_NAME: web-server depends_on: - web-server web-server: image: nginx ```
Options
- ADocker containers are completely isolated from each other, so the two Docker containers will not communicate with each other.
- BDocker Compose will use the depends_on configuration to provide the app Docker container with the IP address of the web-server Docker container.
- CThe application running in the app Docker container will use DNS to resolve the SERVER_NAME environment variable that contains web-server to an IP address.
- DThe application running in the app Docker container will use ARP to resolve the SERVER_NAME environment variable that contains web-server to an IP address.
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