Which of the following is the correct way to specify a service's port mapping in a docker-compose.yml file?

easy📝 Syntax Q12 of 15

Spring Boot - Docker and Deployment

Which of the following is the correct way to specify a service's port mapping in a docker-compose.yml file?

Aports: - "8080:8080"

Bports: 8080:8080

Cport: 8080->8080

Dexpose: 8080:8080

Step-by-Step Solution

Solution:

Step 1: Recall docker-compose port syntax
Ports are listed as a YAML array with dash and quotes, like ports: - "hostPort:containerPort".
Step 2: Check options
ports: - "8080:8080" matches the correct YAML syntax for port mapping.
Final Answer:
ports: - "8080:8080" -> Option A
Quick Check:
Port mapping uses dash and quotes in YAML [OK]

Quick Trick: Use dash and quotes for ports in docker-compose YAML [OK]

Common Mistakes:

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