Final answer:
Shoulder surfing and tailgating are examples of social engineering. Shoulder surfing involves observing someone's private information without their knowledge, while tailgating refers to the unauthorized access to restricted areas by following someone with access.
Step-by-step explanation:
The examples of social engineering from the provided options are A) Shoulder surfing and E) Tailgating.
Shoulder surfing occurs when someone looks over a person's shoulder to gather information such as passwords or personal identification numbers. This technique is often used in public places where individuals might be entering sensitive information on their devices.
Tailgating, also known as 'piggybacking,' happens when an unauthorized person follows someone with legitimate access into a restricted area or system. For instance, someone may enter a secure building by closely following an employee who has swiped their access card without being noticed.
Phishing attacks, another form of social engineering, is not selected here but is also a common method used by attackers to deceive individuals into providing confidential information through fraudulent emails or messages.
Options C) Firewall configuration and D) Encryption techniques are not related to social engineering but are considered security measures used to protect data and systems from attacks.