Explain what are Pre-processor Elements? List some of the pre-processor elements?
A pre-processor is something that will happen before the sampler executes. To configure the sample request prior to its execution or to update variables that are not extracted from response text pre-processor elements are used.
Some of the pre-processor elements are :
* HTTP URL re-writing modifier
* HTTP user parameter modifier
* HTML link parser
* BeanShell PreProcessor
