You start a new job, and the first thing your new company wants you to do is create a user id and a password. to remember your password, you write it on a postit note and throw the note out. someone takes the note out of your garbage and gets your password. this is an example of

The answer to this question is dumpster diving.

Explanation:

In information technology(IT) a dumpster diving is a technique for retrieve data that could be used to attack computer networks. This technique used for finding data in someone else's trash and it is also known as a large trash container. Dumpster diving is not defined as searching for the trash to obvious stores like access code or password penned down on sticky notes. So dumpster diving is an example of this technique.