Variables

- [Instructor] The things that you can vary … in software testing are obviously very interesting. … It's through changing these inputs … to the system that we're able to observe … and understand the system. … There are some obvious candidates like input fields, … but there are also a number of other … far less obvious things that can vary in a system. … Let's consider a few of them. … The first one is URLs. … You might not think of URLs as a variable, … For example, let's look at this simple query on Amazon. … that there's actually quite a bit of information … and then we have some other information … about the categories and things like that, … that is being sent in this URL. … So if we were to modify and change this URL, … and share them to other people, … and modify them in various ways, … then you could get different results. … So things like this, things can change … in this URL, and so it is a variable in the system. … Now, another thing that you might not think … but they might be set by an administrator. …