Log4j - Interview Questions and Answers for 'Debug' - 3 question(s) found - Order By Newest Q1. What is the difference between DEBUG and TRACE logging levels ? Log4j
Ans. TRACE designates finer grained informational events than the DEBUG.TRACE is level lower than DEBUG. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  Log4j  DEBUG vs TRACERelated Questions What are some different logging levels for log4j ? How will you design a Log4j kind of framework. What is the difference between log4j and java logging api. What is the difference between TimeBasedRollingPolicy and SizeBasedTriggeringPolicy within Log4j ? Can we use both together and What would that mean ? What is the difference between RollingFile and RollingRandomAccessFile in log4j ?
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 This question was recently asked at 'Adella software'.This question is still unanswered. Can you please provide an answer. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  debug Asked in 1 Companies basic Related Questions How would you go about debugging a NullPointerException? How to perform Maven Build and show Debug Information ? 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> Can you organize following Log4j levels in hierarchy ?
WARN, DEBUG,INFO, ERROR What is the difference between INFO and DEBUG logging levels ? What is the difference between DEBUG and TRACE logging levels ? What do you make out of this error
org.hibernate.exception.ConstraintViolationException: could not insert: [<Entity>]
Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (<Constraint Name>) violated
and how would you go about debugging it ? Q3. How to debug multi server deployed application ? Debugging
Ans. Choose the server from the list of defined servers under J2EE Server.
Choose the project to debug.
Click Apply to save changes.
Click Debug to start the server and run the application. Help us improve. Please let us know the company, where you were asked this question : Like Discuss Correct / Improve  debugging  debugging multi server application Asked in 1 Companies Related Questions How would you go about debugging a NullPointerException? How to perform Maven Build and show Debug Information ? 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> Can you organize following Log4j levels in hierarchy ?
WARN, DEBUG,INFO, ERROR What is the difference between INFO and DEBUG logging levels ? What is the difference between DEBUG and TRACE logging levels ? What do you make out of this error
org.hibernate.exception.ConstraintViolationException: could not insert: [<Entity>]
Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (<Constraint Name>) violated
and how would you go about debugging it ? Explain debugging