Apache Related Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Related Interview Questions

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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?

What is Camel?

Is camel an esb?

Does camel link method invocation of bean at compile time or runtime?

What is the content of Exchange in camel?

What jars do I need?

Un-Answered Questions { Apache Related }

What is apache camel?

How to create radio button in apache-wicket?

Which version of java is required to run ant?

Can you define toplogy_message_timeout_secs in apache storm?

How can I write my own ant task?

What is the stopOnException() in multicast?

What file contains configuration for data directory?

217

How to create 404 error page?

Can you explain the solr building blocks?

133

What is dependency? How it is used into ant?

105

What is the purpose of xssfrow class in apache poi?

How will you add a sqrt formular to a cell using apache poi?

What data is specified by schema?

302

What datastores does drill support?

What is the purpose of xssfworkbook class in apache poi?

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