Test case is nothing but a specific process to perform an action with the sets of steps and data along with the expected results for a particular test objective.A test case should only test one limited subset of a feature or a functionlaity.
Testcase execution is very simple . It is just following the test case steps.
yes we can define and execute test case.Testcase execution is very simple .Test case is basic identifer of testing.A test case should only test one limited subset of a feature or a functionlaity.It is just following the test case Contains.It contains execution condition input steps expected results Test case id Severioty Priority field Test data requirement.