Regression Testing and Re-testing

Two of the following three statements are always true for both regression testing and re-testing. Which statement is always true, but only for a re-test?
A. We are running a test that we have run before.
B. The last time we ran the test it found a fault.
C. We have expected results for the test.

Questions by mathan_vel   answers by mathan_vel

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The correct answer is B) The last time we ran the test it found a fault.

Regression tests are run to ensure preselected functionalities are not broken by code modifications.  Regression tests are typically run on every iteration of the build.

Re-tests are run on functionalities where defects were discovered..  After developers fix these defects, testers perform re-tests in order to ensure these functionalities have been properly and completely fixed.

Therefore, both A) and C) apply to both regression tests and re-tests and only B) applies to re-tests alone.

Regression Testing: Regression testing is type of testing in which one will check already tested functionality again and again.

For Example:
Taken a Login Screen While ur trying to login with invalid userid and password then u clicked on Login button it's logined and shows the home page then it is defect u will send to the Developer's team and developers will rectified and released the 2nd build then u have checked Login screen then it is properly working but first time testing the application is not Regression testing already tested defect functionality again and again  is regression testing.

Re Testing: Retesting is a type of testing in which one will check same functionality again and again with different set of values.

For Example:
Take a Loging Screen Checking the with different sets of values
Userid1: User1
Pwd: Pwd1
user Id 2 : User2
Pwd: Pwd2
User id3 : User3
Pwd : pwd3

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