[Solved] Given the following Spring Boot configuration sources:application.properties sets server.port=8080Environment variable SERVER_PORT=9090Command line argument --server.... | Spring Boot

Spring Boot - Application Configuration

Given the following Spring Boot configuration sources:
application.properties sets server.port=8080
Environment variable SERVER_PORT=9090
Command line argument --server.port=7070
What port will the application run on?

A7070

B9090

CDefault port 8081

D8080

Step-by-Step Solution

Solution:

Step 1: List configuration sources and their values
application.properties: 8080, environment variable: 9090, command line argument: 7070.
Step 2: Apply Spring Boot precedence order
Command line arguments override environment variables and properties files, so port is 7070.
Final Answer:
7070 -> Option A
Quick Check:
Command line args override others = 7070 [OK]

Quick Trick: Command line args always win over env and properties [OK]

Common Mistakes:

Choosing environment variable value instead of command line
Assuming properties file overrides environment variables
Forgetting default port fallback

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More Spring Boot Quizzes

Given the following Spring Boot configuration sources:

Step 1: List configuration sources and their values

Step 2: Apply Spring Boot precedence order

Final Answer:

Quick Check:

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