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 does it mean for a message to be?

What is default registry when camel is used with spring?

Define combiner aggregator in apache storm?

How we can set path path and classpath into an ant build file?

Explain how to use pmd validation in ant script?

125

What are various components in apache camel? Which ones have you used?

What is pallet component in apache-wicket?

What is phonetic filter?

136

How you can compile, jar and run into ant command prompt?

How to keep file validation in apache-wicket if no file has been selected?

Can you explain the difference between raw data and processed data?

What is difference between SEDA and VM component in camel?

Explain whether log4j is a thread safe?

In which language apache ant is written?

What command is used to see how to use the bin/solr script?

203

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