This is certainly a question that most interviewers ask today. Can Manual testing replace Automation? Please do not confuse with these.
Manual testing has its own importance in testing. Today 70% of the project is tested manually. Especially the look and feel factor, user-friendliness can be tested manually only. Manual testing fails when it comes to performance testing. If you want to check the load time of a page manually, we need to keep a stop watch inorder to test. This is actually not practical. So the role of Automation comes in this case.
Automation testing is important in testing websites. Especially when it comes to performance. For a web-based application, performance testing is most important. We need to check the load time, response time, Througput, Maximum number of users who can access the application at a given time etc. Performance testing can be done with the help of a tool. So Automation has its own advantages compared to Manual however it can never be an replacement for manual testing. Moreover automation tools are quite expensive. This is one of the reasons why many small companies do not focus much on automation. Regression testing is done mostly with automated tool.
I hope this information was helpful to all.
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