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Testing / Apache JMeter Interview questions

Describe the Aggregate Report listener?

The Aggregate Report listener summarizes sample results into per-sampler statistics: average, median, and 90th/95th/99th percentile response times, throughput, error percentage, and minimum/maximum response times.

Because it aggregates by sampler label (name), a test plan with multiple distinct samplers shows a separate summary row for each one, making it easy to see which specific request is slow or failing rather than just an overall blended average.

It's one of the most commonly used listeners for reporting results after a load test run, though for very large or long-running tests it's still generally better to disable it during the actual run and generate this kind of summary from the saved result file afterward instead.

The Aggregate Report summarizes results:
For very large or long-running tests, it's generally better to:

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