Explain why to use Apache Log4j?
what is the best way to migrate from java.util logging to log4j?
what does WARN and TRACE level indicates in log4j?
what are the two static methods for obtaining a logger object?
why do you get multiple copies of the message in log file sometime?
what is package level logging in log4j?
what are the format characters used in log4j?
what is layouts in log4j?
what are the logging methods provided by logger class?
Inside logger component what are the different log levels?