Test Case :
A test case is a sequence of discrete test steps.A set of 
test inputs, execution conditions, and expected results 
developed for a particular objective.

Test Scenario :
Definition of a set of test cases or test scripts and the 
sequence in which they are to be executed.

Test scenarios describes the possible sequences that can be 
executed on the system.
for eg: opening a file in MSWord is a test scenario. So in 
this scenario a tester can design test cases like, open a 
word document, open a notepad, open a excel sheet and so 
on, with positive and negative test cases inside a test 
scenario. 
where as test case is the unique condition on the 
functionality of an object of the build

Thank you ,thanks alot guys  JUPA

what are the interview questin  asked  in s/w testing      
componys.
plz help me . 
sandeep dash 
sandeep.dash2@gmail.com

Hi,

Test scenario is nothing but a high level functional path of
a functionality...It gives a traceability to the requirement.

Each test scenario can be sub divided into test
cases...these can be termed as low level functionalities of
the application...It gives a complete coverage to the
requieremnts...They focus on the the buisiness logic of the
software...they 'll include affirmative and Negative
conditions,Boundary value testing,field and form level
testing....

Test Case :
A test case is a doc which consists of set of 
test inputs, execution conditions, and expected results 
developed for a particular objective.

Test Scenario :
Definition of a set of test cases or test scripts and the 
sequence in which they are to be executed.

Test Scenario is the high level test case whereas Test case 
is a low level or detailed document contains a set of pre 
conditions,post conditions and the expected output.