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Log4j - Interview Questions and Answers for 'Rollingrandomaccessfile' - 1 question(s) found - Order By Newest

Q1. What is the difference between RollingFile and RollingRandomAccessFile in log4j ?

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What is the difference between TimeBasedRollingPolicy and SizeBasedTriggeringPolicy within Log4j ? Can we use both together and What would that mean ?

In following log4j configuration file, How should we change the logging level to WARN

<Configuration status="DEBUG">
<Appenders>
<RollingFile name="File" fileName="logs/xyz.log" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
<TimeBasedTriggeringPolicy />
</RollingFile>
</Appenders>
<Loggers>
<Root level="DEBUG">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>

in the following log4j config file, How should we change the file name and format

<Configuration status="DEBUG">
<Appenders>
<RollingFile name="File" fileName="logs/xyz.log" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
<TimeBasedTriggeringPolicy />
</RollingFile>
</Appenders>
<Loggers>
<Root level="DEBUG">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>

In the following log4j config, What if we don't need rolling logs

<Configuration status="DEBUG">
<Appenders>
<RollingFile name="File" fileName="logs/xyz.log" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
<TimeBasedTriggeringPolicy />
</RollingFile>
</Appenders>
<Loggers>
<Root level="DEBUG">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>

What are some of the Log4j appenders ?

Can you organize following Log4j levels in hierarchy ?

WARN, DEBUG,INFO, ERROR