What is the difference between functional testing and Non functional testing ? give some examples in support of your answer.

In functional testing we test the functionality of software working acceptable or not were us in non-functional testing we test the characteristic of application like performance of the application, security of the application, durability of the application etc.

Example: if we are testing the login functionality of the application as part of functional testing we will enter the username in username field and enter the password in password field and click on the login button to see whether user can able to login or not.

And as part of Non-functional testing of the same login functionality we see how secure is login functionality and we will also see how much time is taking user to login the application.