[Solved] Consider this application.yml snippet:logging: level: root: ${LOG_LEVEL:INFO}If no environment variable LOG_LEVEL is set, what will be the logging level? | Spring Boot

Spring Boot - Application Configuration

Consider this application.yml snippet:

logging:
  level:
    root: ${LOG_LEVEL:INFO}

If no environment variable LOG_LEVEL is set, what will be the logging level?

ADEBUG

BINFO

Cnull

D${LOG_LEVEL}

Step-by-Step Solution

Solution:

Step 1: Analyze default value in YAML configuration
The placeholder ${LOG_LEVEL:INFO} means use LOG_LEVEL env var or default to INFO if unset.
Step 2: Apply absence of environment variable
Since LOG_LEVEL is not set, the default INFO is used.
Final Answer:
INFO -> Option B
Quick Check:
Default used when env var missing = INFO [OK]

Quick Trick: Default value applies if env var is missing [OK]

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