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 }

How does drill achieve performance?

Can you explain the spout creation?

Is tapestry a jsp tag library?

112

How to create multiple selected listbox in apache-wicket?

What do you infer by the term dynamic fields with respect to apache solr?

119

What is camelcontext?

How do you define nifi content repository?

What does it mean for a message to be?

Can you explain the solr building blocks?

135

I have a form with a submit button. On the form and the submit button are two separate listeners. Which is invoked first?

105

Describe the term request handler?

174

What is the purpose of hssfcolor class in apache poi?

How to set classpath in ant script?

146

What are the main differences between spark sql and apache drill?

how can you get multiple processes to log to the same file?

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