[Solved] What is the main difference between application.yml and application.properties in Spring Boot? — Ans: YAML supports hierarchical data, properties use flat key-value pairs | Spring Boot

Spring Boot - Application Configuration

What is the main difference between application.yml and application.properties in Spring Boot?

AProperties files support comments, YAML does not

BYAML supports hierarchical data, properties use flat key-value pairs

CYAML files cannot be used for Spring Boot configuration

DProperties files require special parsing libraries

Step-by-Step Solution

Solution:

Step 1: Compare data structure support
YAML supports nested structures naturally, allowing hierarchical configuration. Properties files use dot notation for nesting but are essentially flat key-value pairs.
Step 2: Verify other options
Both formats support comments, YAML is fully supported by Spring Boot, and properties files do not require special parsing beyond standard Java support.
Final Answer:
YAML supports hierarchical data, properties use flat key-value pairs -> Option B
Quick Check:
YAML vs Properties structure = hierarchical vs flat [OK]

Quick Trick: YAML = nested, Properties = flat keys with dots [OK]

Common Mistakes:

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What is the main difference between application.yml and application.properties in Spring Boot?