Quiz

2) is the correct answer and the false statement.

Additional information:

Should the message be logged, the Objects provided as parameters will be converted to Strings before being injected into their corresponding placeholders.  

On the other hand, should the message not be logged, A) spares a String concatenation which makes statement 1 correct. The statements under 3 and 4 are also correct because in log4j users can define different appenders and layout patterns in the configuration files.  

See also ‘System Out to Logging’ and ‘Avoid Concatenation in Logging Statements’ for more information on how to transform B) to A) automatically.

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