Gladly!<p>Lets say your software as a service website has a real time analytics graph, so that customers can look at statistics of how much they are using the service in real time.<p>One potential question a customer might want to know is &quot;How many API calls have I made over the last hour&quot;.  This is a moving window average question, and it needs to be displayed&#x2F;done on the front end.<p>My company that I work at has such a feature.<p>Algorithms questions come up all the time in javascript development.