[Solved] You have this in application.properties:spring.datasource.url=jdbc:mysql://localhost:3306/dbspring.datasource.username=rootspring.datasource.password=passspring.datasource.... | Spring Boot

Spring Boot - Application Configuration

You have this in application.properties:

spring.datasource.url=jdbc:mysql://localhost:3306/db
spring.datasource.username=root
spring.datasource.password=pass
spring.datasource.url=jdbc:mysql://localhost:3306/otherdb

Which database URL will Spring Boot use?

Ajdbc:mysql://localhost:3306/otherdb

Bjdbc:mysql://localhost:3306/db

CAn error occurs due to duplicate keys

DThe first URL is used, ignoring the second

Step-by-Step Solution

Solution:

Step 1: Understand duplicate keys in properties
When duplicate keys exist, Spring Boot uses the last occurrence's value.
Step 2: Identify the last URL value
The last spring.datasource.url is set to jdbc:mysql://localhost:3306/otherdb.
Final Answer:
jdbc:mysql://localhost:3306/otherdb -> Option A
Quick Check:
Duplicate keys = last wins in properties files [OK]

Quick Trick: Last duplicate key value wins in properties [OK]

Common Mistakes:

Assuming first key wins
Expecting an error on duplicates
Thinking values merge

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More Spring Boot Quizzes

You have this in application.properties:

Step 1: Understand duplicate keys in properties

Step 2: Identify the last URL value

Final Answer:

Quick Check:

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