How to use PlayStation 4 to set up a security question and answer on your SEN account
This article explains the steps for putting a security question in place in case you forget your password and cannot reset it using your date of birth.
How do I set up a security question and answer on my PlayStation 4?
Select your local user account and press up on the control pad to access the function menu and go to [Settings] > [PlayStation Network] > [Account Information] > [Security Question and Answer] and press (X button).
Choose your security question and answer and select [Continue].