You have to keep in mind that it is never possible to achieve 100% automation. This is because there are many test cases which can't be automated so easily. In those cases, it takes more time to write the automated test than it is going to actually save. Investing double the time and effort in order to make things automated, is not worth it. Manual testing is the best in such cases where you cannot use automated testing because of such reasons.

BY Best Interview Question ON 30 Nov 2020