Me: Yes, I've using DyanamoDB for project A which is the database for our key-value and document database. For Lambda, I've used it in many projects as an event-driven compute service. HR: So you didn't have the experience using them together. We need someone with experiences of using them together so they know what errors mean. Me: They are two separate services and errors in most cases are identified by the loggings engineers set up for the services . I have experience of using these two services. HR: You have to have the experience of using them both together to be able to tell. Me: .........