Discuss about Samplers and Thread Groups in JMeter.

1.	Discuss about Samplers and Thread Groups in JMeter.
Answer» A Thread Group is a collection of threads that are all working on the same problem. Every JMeter test plan starts with this element. Multiple thread groups are PROVIDED, each of which can be set to imitate how users interact with the application, how the load is sustained, and for how long. JMeter's samplers allow JMeter to make various types of requests to a server. JMeter PROVIDES genuine QUERIES to the web server under test using samplers. Except for Test Action, each sampler generates one or more sample RESULTS. The sample results can be viewed in several WAYS and have various features (success/failure, elapsed time, data quantity, etc.).

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