Spring Boot - Docker and Deployment
Which Dockerfile instruction correctly starts a new build stage named 'builder'?
Which Dockerfile instruction correctly starts a new build stage named 'builder'?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Recall Dockerfile syntax for stages
The FROM instruction starts a new build stage and can be named with AS.Step 2: Identify correct syntax
Only FROM supports 'AS builder' syntax; RUN, COPY, CMD do not.Final Answer:
FROM openjdk:17 AS builder -> Option BQuick Check:
Stage start syntax = FROM ... AS name [OK]
Quick Trick: Use FROM ... AS to name build stages in Dockerfile [OK]
Common Mistakes:
- Using RUN or COPY to start a stage
- Forgetting AS keyword
- Misplacing stage name after instruction
Master "Docker and Deployment" in Spring Boot
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