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 ivy?

Is tapestry a jsp tag library?

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What is nifi flowfile?

What is the purpose of xssfcell class in apache poi?

What is camel exchange? Explain its structure?

Can you define stream and stream grouping in apache storm?

What are the core concepts of ant?

What is Message in camel?

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

What are routes in apache camel?

What is an esb? Have you deployed camel on any esb?

Explain how to debug my ant script?

Explain when to use field grouping in storm? Is there any time-out or limit to known field values?

What is dependency? How it is used into ant? What is its use?

What does a drill query look like?

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