Testing / Apache JMeter Interview questions
What is a Sampler in JMeter?
A Sampler is the element that actually sends a request to the system under test - an HTTP Request sampler sends an HTTP call, a JDBC Request sampler runs a database query, an FTP Request sampler performs an FTP operation, and so on for each supported protocol.
Each sampler produces a sample result - response time, response code, response data, and success/failure status - which listeners then display and which assertions evaluate.
Samplers are the actual work-doing elements of a test plan; everything else (controllers, timers, listeners) exists to organize, pace, or observe the samplers rather than to generate requests itself.
A Sampler's job is to:
An HTTP Request sampler specifically sends:
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