Final answer:
When the interviewer greets you with an extended hand, you should greet them with a firm handshake.
Step-by-step explanation:
When the interviewer greets you with an extended hand, you should greet the interviewer with a firm handshake.
A firm handshake is a common professional greeting that conveys confidence and professionalism. To give a firm handshake, grip the person's hand firmly, but not too tightly, and shake up and down a couple of times.
Remember to make eye contact and smile while giving the handshake to create a positive first impression.