1.exactly when we go for regression testing?why? 2.what is compatibility testin

1.exactly when we go for regression testing?why?
2.what is compatibility testing?what defect u found while
testing give example?
3.how many test cases you write and execute per day?

Question Posted / jyoti

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1.exactly when we go for regression testing?why? 2.what is compatibility testing?what defect u foun..

Answer / sai

If any new enhancement is done then we will do regression testing to check whether this change is effecting other functionality of the software or not.It shouldn't affect other functionality of the SW. Then you can pass that test.

Compatibility testing:
Testing the all compilers , printers, fax etc are supporting that application.

What defect you found?
This answer is different for each application. It depends on what projects you put on your resume.
For example if you put Banking project you can tell so many defects like
When I try to enter Banking web page it is throwing STU(SYSTEM TEMPORARILY UNAVAILABLE). This might happen because of the server down or other environmental factors/code defects etc.
When I enter one A/C number it is navigating me to the other Account page.
When I am calculating the interest rates is showing wrong calculations etc
And interest should rounded to nearest whole number, but it is not rounding etc. According to your project make up your own defects.
3.This answer depends on Requirement.

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