Functional Requirements Examples:

• The user tries to log into the system and he/she needs to go through the authentication.
• The system shut down because of a cyberattack.
• The user registers for the first time and he/she gets the verification email.

Non-functional Requirements Example:

• Restrictions, like the development, should be conducted only on platform A.
• Only biometric identification techniques should be used for user information authentication.
• Each request should be processed within 20 seconds.
• The website loads in 3 seconds when the number of simultaneous users is more than a thousand.