Log4j
Logging
Interview Questions Interview Questions Logging What types of logs exist? What are the components of the log4j logging system? What is a Logger in log4j? What is an Appender in log4j? What is a Layout in log4j? List the logging levels in log4j. What is their priority order? What configuration methods exist for log4j? What types of logs exist? System; Security; Application (Business). A user logs into the application, and their password is verified.