[Solved] Given the following YAML:database: url: jdbc:mysql://localhost:3306/mydb maxConnections:... // getters and setters }What will be the value of databaseConfig.getMaxConnections() after binding? | Spring Boot

Spring Boot - Application Configuration

Given the following YAML:

database:
  url: jdbc:mysql://localhost:3306/mydb
  maxConnections: 20

And this class:

@ConfigurationProperties(prefix = "database")
public class DatabaseConfig {
  private String url;
  private int maxConnections;

  // getters and setters
}

What will be the value of databaseConfig.getMaxConnections() after binding?

AThrows an exception due to missing annotation

B0

Cnull

D20

Step-by-Step Solution

Solution:

Step 1: Identify prefix and properties
The prefix is "database" and properties url and maxConnections match the YAML keys.
Step 2: Binding process
Spring Boot binds maxConnections to 20 as per YAML.
Final Answer:
20 -> Option D
Quick Check:
Property names and types match YAML values [OK]

Quick Trick: Property names must match YAML keys for binding [OK]

Common Mistakes:

Assuming default values override YAML
Forgetting to add getters/setters
Confusing null with zero for primitives

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More Spring Boot Quizzes

Given the following YAML:

Step 1: Identify prefix and properties

Step 2: Binding process

Final Answer:

Quick Check:

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