What technological stacks or platforms have you not had to use in your practice?

This question involves personal experience, so the answer depends on the specific developer. Usually, if you haven't used certain technology stacks or platforms, it's best to honestly state that and, if possible, explain the reasons — such as lack of projects, specific requirements, or preferences.

Example answer:

"In my experience, I haven't worked with platforms like Apache Hadoop or Kubernetes, as my projects have been focused on web development using Node.js and Express. However, I am familiar with their concepts and am willing to learn new technologies as needed."

It's important to show willingness to learn and adapt, rather than just listing what you don't know."