Question

How are analog and digital signals similar? Check all that apply.

Both reduce noise.
Both pick up noise.
Both make noise louder.
Both transmit data or information.
Both get weaker when traveling long distances.

Answer 1

Correct answers:
- Both pick up noise. — Both analog and digital signals can suffer interference and noise during transmission.
- Both transmit data or information. — Both types are used to carry information (voice, video, sensor data, etc.).
- Both get weaker when traveling long distances. — Both experience attenuation and may need amplification or repeaters.

Not correct:
- Both reduce noise. — Signals don’t inherently reduce noise (though systems can include filtering/error-correction).
- Both make noise louder. — Noise may be amplified along with the signal, but the signals themselves don’t purposely “make noise louder.”