I would advise against it. Two reasons: - if the person interviewing you know the specific tech you picked, you give them an opening to control the interview. They can go anywhere they want and you would likely fall short unless you know the stack in&out

- when you pick specific technology, you also have to defend why this one specifically. For ex, why redis and not memcache or why only postgres and not redshift..

If you keep it at sql and no-sql, you can easily defend the answer and control the interview