Spring Boot Logging - SLF4J, Logback Mock Test

Question 1: CORE SPRING BOOT - Purpose of SLF4J

What is the primary purpose of SLF4J in Spring Boot?

Question 2: CORE SPRING BOOT - Logback Integration

Which logging framework is used by default in Spring Boot?

Question 3: CORE SPRING BOOT - Logging Levels

Which of the following is not a standard logging level in SLF4J/Logback?

Question 4: CORE SPRING BOOT - Code Snippet (SLF4J Logging)

What will the following code output if the logging level is set to INFO?

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class LoggingExample {
    private static final Logger logger = LoggerFactory.getLogger(LoggingExample.class);

    public void run() {
        logger.debug("Debug message");
        logger.info("Info message");
        logger.error("Error message");
    }
}

Question 5: CORE SPRING BOOT - Configuring Logging in application.properties

How can you set the logging level for a specific package in Spring Boot using application.properties?

Question 6: CORE SPRING BOOT - Code Snippet (Logging in a Spring Component)

What will happen when this component is executed?

@Component
public class MyService {
    private static final Logger logger = LoggerFactory.getLogger(MyService.class);

    public void process() {
        logger.info("Processing started");
    }
}

Question 7: CORE SPRING BOOT - Code Snippet (Custom Logback Configuration)

Consider the following logback-spring.xml snippet. What does it do?

<logger name="com.example" level="DEBUG"/>
<root level="INFO">
    <appender-ref ref="CONSOLE"/>
</root>

Question 8: CORE SPRING BOOT - Logging in YAML

How do you configure logging levels in application.yml?

Question 9: CORE SPRING BOOT - Best Practices for Logging

Which of the following is considered a best practice for logging in Spring Boot?

Question 10: CORE SPRING BOOT - Code Snippet (Parameterized Logging)

What will the following SLF4J code output if userId = 101?

logger.info("Processing user with id: {}", userId);