Which of the following is the correct way to declare a class to bind properties prefixed with app.settings using @ConfigurationProperties?

easy📝 Syntax Q3 of 15

Spring Boot - Application Configuration

Which of the following is the correct way to declare a class to bind properties prefixed with app.settings using @ConfigurationProperties?

A@ConfigurationProperties(prefix = "app.settings") public class AppSettings {}

B@ConfigurationProperties("app.settings") public class AppSettings {}

C@ConfigurationProperties(prefix = app.settings) public class AppSettings {}

D@ConfigurationProperties(prefix = 'app.settings') public class AppSettings {}

Step-by-Step Solution

Solution:

Step 1: Check correct syntax for prefix attribute
The prefix must be a string literal with double quotes inside the annotation attribute.
Step 2: Identify invalid syntax
@ConfigurationProperties("app.settings") public class AppSettings {} misses the prefix= keyword, C lacks quotes, and D uses single quotes which is invalid in Java annotations.
Final Answer:
@ConfigurationProperties(prefix = "app.settings") public class AppSettings {} -> Option A
Quick Check:
Prefix syntax = prefix = "value" [OK]

Quick Trick: Always use prefix = "string" with double quotes [OK]

Common Mistakes:

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