[Solved] Given this Dockerfile snippet for a Spring Boot app:FROM openjdk:17-jdk-slim COPY target/app.jar /app.jar ENTRYPOINT ["java", "-jar", "/app.jar"]What happens when you run this container? | Spring Boot

Spring Boot - Docker and Deployment

Given this Dockerfile snippet for a Spring Boot app:

FROM openjdk:17-jdk-slim
COPY target/app.jar /app.jar
ENTRYPOINT ["java", "-jar", "/app.jar"]

What happens when you run this container?

AThe Spring Boot app starts inside the container using Java 17.

BThe container will fail because the ENTRYPOINT syntax is wrong.

CThe app.jar file is deleted after copying.

DThe container runs but does not start the app.

Step-by-Step Solution

Solution:

Step 1: Analyze Dockerfile commands
The base image provides Java 17. The app.jar is copied into the container. ENTRYPOINT runs the jar with Java.
Step 2: Understand container behavior on run
Running the container executes the ENTRYPOINT command, starting the Spring Boot app inside.
Final Answer:
The Spring Boot app starts inside the container using Java 17. -> Option A
Quick Check:
ENTRYPOINT runs app.jar with Java [OK]

Quick Trick: ENTRYPOINT runs the app inside container [OK]

Common Mistakes:

Master "Docker and Deployment" in Spring Boot

9 interactive learning modes - each teaches the same concept differently

More Spring Boot Quizzes

Given this Dockerfile snippet for a Spring Boot app: