QA Concepts Question:

Test Data: collection of test input values that are
consumed during the execution of a test, and expected
results referenced for comparative purposes. Test data may
be any kind of input to application, any kind of file that
is loaded by the application or entries read from the
database tables. It may be in any format like xml test data,
system test data, SQL test data or stress test data.

Test Case : A set of test inputs, execution conditions, and
expected results developed for a particular objective, such
as to exercise a particular program ...
Test cases is a sequence of steps to test the correct
behavior of a functionality/feature of an application