Before you download and install JMeter, your should ensure that your computer meets the basic requirements for its installation. JMeter runs on most operating systems however its good to check if your operating system is supported to avoid any issues.
The Post-Processors in JMeter are used to perform an action after executing a Samplers request and they run immediately after a Sampler is run. A Post-Processor is usually used to process and extract data from the server’s response.
Assertions in JMeter provide the criteria to determine whether the test case has passed or failed. You can use JMeter Assertions to ensure returned values match expected results. They are processed after every sampler in their scope.