No, we didnt go to the testing with out test cases. 
Actually  testing team is for better build releases. So 
definetly we can write the test cases.

Hi friends,
we cvannot go testing without testcase.we do write 
testcasesthen only we execute to find Bugs.
If wrong please correct me.

Hi,
SOme time due to lack of time v will do the testing without 
writeing the test cases this method is called AD-hoc 
testing.
if v got the bug means v log the bug with reproduceable 
steps.

Yes, we can do but there is a huge chance to miss out the 
finding of defects  from the application  because Test case 
document contains the sequencially points to be applied for 
application that means we can check the module with 
sequencially with applying  different condition.(but test 
case should be written properly with covering all the 
conditions of this module  to find out the defects) .
                Otherwise there is no mean....please anyone 
know better ,let me know in my mail-id or mobile no.

regards
Tapan Nayak
+919920304981

yes,we can do

no,we cant do

we can do, but we are not justified 100 percent perfect.
Becoze we dont know about requirements perfect.

Yes we can do testing without writing any test cases.Ad-hoc 
testing is one of the methods followed.

but, if some company asks like "Did u prepare the Test Cases
in ur previous company", then if we say ad-hoc testing, then
that interviewer will consider us or not?

SEE Sirisha,

Ad-hoc testing done my Sr.tester who have very good exp on 
domain,STLC process and good understanding on that project 
and exp on testing will do.